Which of the following numbers is divisible by 3?

1

(a)

2592

(b)

5493

(c)

39583

Which of the following numbers is divisible by both 13 and 3?

1

(a)

1625

(b)

1296

(c)

121229

(d)

None of these

Which of the following is not co-prime?

1

(a)

8. 10

(b)

11, 12

(c)

1, 3

(d)

31, 33

 The number of distinct prime factors of the largest 4-digit number is 

1

(a)

2

(b)

3

(c)

5

(d)

11

The largest number, which always divides the sum of any pair of consecutive odd numbers is

1

(a)

2

(b)

4

(c)

6

(d)

8

Which of the following statements is true?

1

(a)

The product of two even numbers is always even.

(b)

The sum of three odd numbers is even.

(c)

All prime numbers are odd.

(d)

Prime numbers do not have any factors.

The greatest common factor of 8 and 20 is

1

(a)

2

(b)

1

(c)

4

(d)

8

The greatest common factor of 5, 15 and 25 is

1

(a)

1

(b)

5

(c)

10

(d)

15

The LCM of 6 and 18 is

1

(a)

6

(b)

12

(c)

18

(d)

36

The LCM of 5 and 6 is

1

(a)

10

(b)

20

(c)

30

(d)

60

Find the factors of the first four multiples of 12.

2

(a)

Write all the factors of the following number: 21

2

(a)

Write first five multiples of 8

2

(a)

Write all the factors of the following number 42

2

(a)

Write all the multiples of 11 upto 110.

2

(a)

Is 37 a factor of 460132?

2

(a)

Express the following as the sum of two odd prime numbers 34

2

(a)

What is the greatest prime number between 1 and 10?

2

(a)

Find the product of first natural, first whole and first prime number.

2

(a)

Check whether the number 9524624 is divisible by 4 or not.

2

(a)

Using divisibility tests, determine the following number are divisible by 11? 10824

2

(a)

Is the number 17152652 divisible by both 4 and 11?

2

(a)

Find the common factors of 20 and 28

2

(a)

A number is divisible by 8. By what other numbers will that number be divisible?

2

(a)

Here is a factor tree for 60. Write the missing number.

2

(a)

Using divisibility tests, determine the following number is divisible by 6? 1258

3

(a)

Which of the following numbers are co-prime? 30 and 415

3

(a)

Give the factorisation of 136

3

(a)

Five bells begin to toll together at intervals of 9 s, 6 s, 4 s, 10 s and 58 s, respectively, how many times will they toll together in the span of 1 h?

3

(a)

Find the least number of five digits that is exactly divisible by 16, 18, 24 and 30.

3

(a)

Write a digit in the blank space of the following number, so that the number formed is divisible by 11. 92___389

4

(a)

Fatima wants to mail three parcels to three village schools. She finds that the postal charges are Rs 20, Rs 28 and Rs 36, respectively. If she wants to buy stamps only of one denomination, what is the greatest denomination of stamps she must buy to mail the three parcels?

4

(a)

On a morning walk, three persons step off together and their steps measure 40 cm, 42 cm and 46 cm, respectively.
(a) What is the minimum distance each should walk so that each can cover the same distance in complete steps?
(b) What are the benifits of morning walk?

4

(a)

Monica, Heronica and Rajat begin to jog around a circular stadium. They complete their revolution in 42 s, 56 s and 63 s, respectively. How many seconds after will they be together at the starting point?

4

(a)

Find the largest possible number of 5 digits, which exactly divisible by 32, 36 and 40.

4

(a)