Knowing Our Numbers

5 Topics | 5 Quizzes
Whole Numbers

5 Topics | 5 Quizzes
Playing With Numbers

10 Topics | 5 Quizzes
Basic Geometrical Ideas

12 Topics | 4 Quizzes
Understanding Elementary Shapes

9 Topics | 5 Quizzes
Fractions

13 Topics | 4 Quizzes
Integers

5 Topics | 5 Quizzes
Decimals

6 Topics | 4 Quizzes
Data Handling

9 Topics | 4 Quizzes
Mensuration

3 Topics | 4 Quizzes
Algebra

10 Topics | 4 Quizzes
Ratio and Proportion

3 Topics | 4 Quizzes
Practical Geometry

5 Topics | 4 Quizzes
Symmetry

8 Topics | 4 Quizzes
__Tests for Divisibility of Numbers__

- If a number has 0 in its units place it is divisible by 10.
- If a number has either 0 or 5 in its units place it is divisible by 5.
- If the sum of the digits of a number is a multiple of 3 then it is divisible by 3.
- If a number is divisible by 2 and 3 both, it is divisible by 6.
- A number with 3 or more digits is divisible by 4 if the number formed by its last two digits (i.e., units and tens) is divisible by 4.
- A number with 4 or more digits is divisible by 8 if the number formed by its last three digits is divisible by 8.
- A number is divisible by 9 if the sum of all the digits of the number is divisible by 9.
- A number is divisible by 11 if the difference between the sum of the digits at odd places (from the right) and the sum of the digits at even places (from the right) of the number is either 0 or divisible by 11.

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