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Bayati
DEEN
Log inStart for free
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Maths that
sticks.

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Short lessons, questions that reshuffle every time, and a learning path that shows you what you need first. Grades 7 to 10.

Start for freeNo sign-up. Create an account later if you like.
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What is Bayati?

Who is Bayati for?

For all of secondary school. 38 chapters with 353 topics, in order from rational numbers to vectors, each building on the one before. Plus around 14,000 question templates. Each one rolls new numbers whenever you practise, which makes billions of unique questions.

Rational numbersGrade 7 · chapter 1 of 8
Terms and variablesGrade 7 · chapter 2 of 8
EquationsGrade 7 · chapter 3 of 8
Relations and proportionalityGrade 7 · chapter 4 of 8
Percentages and interestGrade 7 · chapter 5 of 8
Angles and symmetryGrade 7 · chapter 6 of 8
Congruence and trianglesGrade 7 · chapter 7 of 8
Data and chanceGrade 7 · chapter 8 of 8
Terms and binomial formulasGrade 8 · chapter 1 of 11
Equations in depthGrade 8 · chapter 2 of 11
Linear functionsGrade 8 · chapter 3 of 11
Systems of linear equationsGrade 8 · chapter 4 of 11
PowersGrade 8 · chapter 5 of 11
WurzelnGrade 8 · chapter 6 of 11
Areas, circles and solidsGrade 8 · chapter 7 of 11
Pythagorean theoremGrade 8 · chapter 8 of 11
Similarity and dilationGrade 8 · chapter 9 of 11
Probability in depthGrade 8 · chapter 10 of 11
Percentages and interest in depthGrade 8 · chapter 11 of 11
Real numbersGrade 9 · chapter 1 of 10
Powers and roots in depthGrade 9 · chapter 2 of 10
Quadratic functionsGrade 9 · chapter 3 of 10
Quadratic equationsGrade 9 · chapter 4 of 10
Power and root functionsGrade 9 · chapter 5 of 10
TrigonometryGrade 9 · chapter 6 of 10
Similarity in depthGrade 9 · chapter 7 of 10
Solid geometry in depthGrade 9 · chapter 8 of 10
Exponentielles WachstumGrade 9 · chapter 9 of 10
Probability and combinatoricsGrade 9 · chapter 10 of 10
Exponential functions and logarithmsGrade 10 · chapter 1 of 9
Polynomial functionsGrade 10 · chapter 2 of 9
Trigonometric functionsGrade 10 · chapter 3 of 9
Circle geometryGrade 10 · chapter 4 of 9
DifferentialrechnungGrade 10 · chapter 5 of 9
Curve analysisGrade 10 · chapter 6 of 9
WachstumsmodelleGrade 10 · chapter 7 of 9
Probability and statistics in depthGrade 10 · chapter 8 of 9
VectorsGrade 10 · chapter 9 of 9
38 chapters, 353 topicsGrades 7 to 10
Grade 7Grade 8Grade 9Grade 10

What if I can’t remember something?

The Learning path shows you what you need first. If something is missing, it takes you there first and then back to your topic.

Where does Bayati run?

On your phone, your tablet and in the browser. With an account you pick up where you left off on any device.

What does Bayati cost?

As a guest it’s free, with limits. With an account it’s free as well, with fewer limits. Premium costs €44.99 a year, that’s €3.75 a month.

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A real question

Try it now.

This is how Bayati feels. Tap an answer, check, take a look. No account needed.

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Three areas

Understand, practise, compete.

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Learning path

Want to master quadratic equations? Bayati shows you the way.

Bayati knows which topics come before every topic. You only learn what you’re really missing and always see where you are.

Terms and variablesGrade 7 · done
Binomische FormelnGrade 8 · done
Rearranging equationsnow · approx. 5 min
3
Square rootsGrade 9
Quadratic equationsYour goal
Quadratic functionsGrade 9 · next
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Grades 7 to 10

38 chapters, 353 topics.

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Your Bayati

Looks the way you want.

Bayati, Organic, Rosé or Robotics. Every choice changes the phone on the right right away.Every choice changes the tablet and phone on the right right away.

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For parents

Safe for kids.

More for parents
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Questions

What you want to know.

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Ready? The first lesson takes five minutes.

Start for freeNo sign-up. Create an account later if you like.
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9:41
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Good evening, Luise

Grade 7 · 12 min learned today
3LEVEL
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XP to level 4120 / 200
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Pick up where you left off7.01.03 Ordering and comparing
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Step 3 of 9 · approx. 4 min
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Formulas
Tests
playing cards
Duel
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Mo
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Chapters6 chapters
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Rational numbers7.01
4/15
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Terms and variables7.02
1/13
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Equations7.03
0/12
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Relations and proportionality7.04
0/14
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Percentages and interest7.05
0/14
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Angles and symmetry7.06
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Good evening, Luise

Grade 7 · 12 min learned today
3LEVEL
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XP to level 4120 / 200
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Formulas
Tests
playing cards
Duel
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\n\n3 days in a row\n
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Mo
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Tu
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We
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Th
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Fr
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Sa
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Su
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Pick up where you left off7.01.03 Ordering and comparing
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Step 3 of 9 · approx. 4 min
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Chapters6 chapters
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Rational numbers7.01
4/15
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Terms and variables7.02
1/13
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Equations7.03
0/12
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Relations and proportionality7.04
0/14
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Percentages and interest7.05
0/14
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Angles and symmetry7.06
0/15
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7.01

Rational numbers

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4 of 15 done
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Understanding numbers2 of 4
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Negative numbers in everyday life7.01.01 · done
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The number line7.01.02 · done
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Ordering and comparingnow · step 3 of 9 · approx. 4 min
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4
Absolute value and opposite number7.01.04
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Plus and minus2 of 3
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5
Adding integers7.01.05
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Subtracting rational numbers7.01.06 · done
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Mixed addition and subtraction7.01.07 · done
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Times and divided by0 of 4
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8
Multiplying integers7.01.08
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9
Dividing integers7.01.09
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Sign rules (summary)7.01.10
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11
Order of operations and brackets7.01.11
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Applying0 of 4
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12
Rational numbers: fractions7.01.12
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13
Rational numbers: decimals7.01.13
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14
The coordinate plane (all four quadrants)7.01.14
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Word problems with rational numbers7.01.15
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Chapter done7.01 · 11 to go
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Duel · 7.01 Rational numbers
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Absolute value and opposite number
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What is the absolute value?|−12|
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Test · 7.01 Rational numbers
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7 of 10 correct

Time 8:24 · 2 more than last time
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Questions
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Got wrong
\nQuestion 4 · Absolute value and opposite\n
What is the absolute value?|−12|
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Your answer−12
Correct12
\nThe absolute value is the distance from zero and never negative.\nLearning path\n
\nQuestion 8 · Multiplying integers\n
Calculate:(−3) · 4
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Your answer12
Correct−12
\nDifferent signs give minus.\nLearning path\n
\nQuestion 9 · Multiplying integers\n
Calculate:(−6) · (−2)
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Your answer−12
Correct12
\nSame signs give plus.\nLearning path\n
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Practise mistakes again
Done
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Distance from zero

The absolute value of a number is its distance from zero on the number line. It is written with two vertical bars.

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\\(|-5| = 5\\)The distance from −5 to zero is 5.
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  1. 1
    Find the number on the number line\\(-5\\)
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  2. 2
    Count the steps to zero\\(-5 \\to 0\\)
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    Write down the absolute value\\(|-5| = 5\\)
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RememberAn absolute value is never negative.
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Watch out\\(-\\lvert -5 \\rvert\\) is \\(-5\\), not \\(5\\).
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What is \\(|-12|\\)?Tap to see the answer
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What is \\(|-12|\\)?\\(|-12| = 12\\)From −12 to zero it is 12 steps.
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Drawing: number line from −6 to 6, distance from −5 to zero marked
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Next
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Duel · 7.01 Rational numbers
3 / 51:12
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Absolute value and opposite number
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What is the absolute value?|−12|
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Check
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Test · 7.01 Rational numbers
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7/10
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7 of 10 correct

Time 8:24 · 2 more than last time
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Questions
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Got wrong
\nQuestion 4 · Absolute value and opposite\n
What is the absolute value?|−12|
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Your answer−12
Correct12
\nThe absolute value is the distance from zero and never negative.\nLearning path\n
\nQuestion 8 · Multiplying integers\n
Calculate:(−3) · 4
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Your answer12
Correct−12
\nDifferent signs give minus.\nLearning path\n
\nQuestion 9 · Multiplying integers\n
Calculate:(−6) · (−2)
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Your answer−12
Correct12
\nSame signs give plus.\nLearning path\n
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Practise mistakes again
Done
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7.01.04 Absolute value and opposite
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Distance from zero

The absolute value of a number is its distance from zero on the number line. It is written with two vertical bars.

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\\(|-5| = 5\\)The distance from −5 to zero is 5.
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    \n
  1. 1
    Find the number on the number line\\(-5\\)
    2. \n
  2. 2
    Count the steps to zero\\(-5 \\to 0\\)
    3. \n
  3. 3
    Write down the absolute value\\(|-5| = 5\\)
    4. \n
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RememberAn absolute value is never negative.
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Watch out\\(-\\lvert -5 \\rvert\\) is \\(-5\\), not \\(5\\).
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What is \\(|-12|\\)?Tap to see the answer
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What is \\(|-12|\\)?\\(|-12| = 12\\)From −12 to zero it is 12 steps.
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Drawing: number line from −6 to 6, distance from −5 to zero marked
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Next
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Which grade are you in?
Gr. {{ k.g }}Gr. {{ k.g }}
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That was 5 of more than 1,000 questions.
Continue in the appFive new questions
\nContinue in the app\n
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\nGrade 7 · Angle sum in a triangle\nTwo angles of a triangle are 50° and 70°. How big is the third angle γ?\nOpen the arc on the protractor as wide as γ. Then check.\n
Correct!
180° − 50° − 70° = 60°.
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Wrong!
You had {{ wertText }}, the answer is 60°.
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Check
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Check
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Solve again
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\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n50°\n70°\n{{ gammaText }}\n50°\n70°\n{{ hCText }}\n{{ diffText }}\n180°\n0°\n180°\n
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What is opposite red?5
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\nr = {{ k.r }} cm\nπ · r\nr
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A = π · r²≈ {{ k.area }} cm²
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\n\n\n\n½ππ1½π2π\n
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ReImφ
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eiφ = cos φ + i · sin φ
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\n\n\n\n½ππ1½πx = 1\n
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tan φ = sin φ : cos φ
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{{ vw.s }}
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eiφ = cos φ + i · sin φ
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A right triangle with sides a, b and c.A square on each side.
Four such triangles in a square, arranged twice.
Left freec²a² + b²
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a² + b² = c²{{ p2.rech }}
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2π · r
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O =2 · πr²+2πr · h
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Percent
Euro
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{{ rw.l }}{{ rw.r }}
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\n{{ st.hlab }}\n{{ st.l1 }}\n{{ st.ls1 }}\nShadow {{ st.ls2 }}
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{{ st.eq }}{{ st.res }}
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\n{{ t.s }}\n{{ sp.vs }}
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{{ sp.eq }}{{ sp.hint }}
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\n{{ si.labA }}\n{{ si.labB }}\n{{ si.sv }}\n?\n{{ si.sv }}
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{{ si.eq }}{{ si.res }}
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\n½\n{{ n.s }}\n{{ n.s }}
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{{ bd.eq }}{{ bd.res }}
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PyramidCuboid
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V = ⅓ · G · h
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