Free Mental Maths Olympiad Class 6 Study Material

Preparation Material of CREST Mental Maths Olympiad (CMMO) for Class 6

Below is the Class 6 study material for the CREST Mental Maths Olympiad (CMMO), grouped under the nine official Class 6 syllabus units. Most of it builds on the Class 5 list, and one unit, Algebra, appears for the first time. Each link opens a free CREST topic page.

What's new in Class 6

The official syllabus adds one unit to the eight from Class 5: Algebra. In this guide it covers two topics, variables and constants, and algebraic expressions. Knowing Our Numbers also gains a natural numbers topic. The other units continue from Class 5: integers, fractions and decimals, factors and primes, shapes, perimeter and area, graphs and symmetry, and Comparing Quantities.

Algebra then stays on the CMMO syllabus in every class up to Class 12, so the habit of working with a letter in place of a number is worth building now.

Class 6 paper at a glance

• 100 questions, 120 marks, 60 minutes
• Basique: 80 questions worth 1 mark each
• Avance: 20 questions worth 2 marks each
• Same pattern as Class 5, and the same at Level 2

How to use this guide in Class 6

• Do the Algebra group first. Practise finding the value of a short expression in your head for a given value of the letter.
• If you took the CMMO in Class 5, treat the other eight units as revision and spend more time on the topics you found slow last year.
• Use the free Class 6 Mental Maths worksheets for topic practice and the Class 6 CMMO sample paper for a timed run at 36 seconds a question.

Knowing Our Numbers

1. System of numeration
2. Comparison of numbers
3. Estimation of numbers and place value of a number
4. BODMAS rule
5. Natural numbers
6. Whole numbers
7. Properties of whole numbers

Integers

1. Integers
2. Addition and subtraction of integers on number line
3. Properties of integers over addition, subtraction, multiplication, division

Fractions and Decimals 

1. Fractions: Operations and types
2. Ascending and descending order of the fractions
3. Decimals and their place values
4. Operations on decimals
5. Decimal fractions
6. Ascending and descending order of the decimals

Algebra

1. Variables and constants
2. Algebraic expressions

Playing With Numbers

1. Factors and multiples
2. Prime numbers
3. Composite numbers
4. Divisibility rules
5. Prime factorization
6. H.C.F. and L.C.M.
7. Play with patterns

Understanding Elementary Shapes

1. Lines and angles
2. Classification of triangles, circle & quadrilateral
3. Polygons
4. 3D shapes

Mensuration

1. Perimeter of rectangle
2. Perimeter of square
3. Perimeter of triangle
4. Perimeter of closed figures
5. Area of rectangle, square and combined figures

Data Handling and Symmetry

1. Pictographs, line graph and bar graph
2. Symmetry - Point & Reflection

Comparing Quantities

1. Percentage
2. Speed, time and distance
3. Profit and loss
4. Problems on ages
5. Average
6. Ratio and proportion