Playing with Numbers Test

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Playing with Numbers Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is smallest prime number?

A
4

B
1

C
3

D
2

Solution

Explanation:

2 . It is the smallest and even prime number.
Question 2
1 / -0

Which of them is prime number?

A
9

B
3

C
6

D
8

Solution

Explanation:

The factors of 3 are 1 and itself. Therefore 3 is a prime number.
Question 3
1 / -0

Third multiple of 6 is _____.

A
30

B
18

C
24

D
12

Solution

Explanation:

Multiples of 6 is 6, 12, 18, 24, 30...... The third multiple of 6 is 18.
Question 4
1 / -0

_____ is the factor of 68.

A
6

B
3

C
5

D
17

Solution

Explanation:

68 = 2 x 2 x 17. Therefore 17 is the factor of 68.
Question 5
1 / -0

If a number is divisible by two co-prime numbers then it is divisible by their

A
quotient also

B
sum also

C
product also

D
difference also

Solution

Explanation:

3 and 5 are co-primes. 15 is divisible by 3 and 5 and also divisible by the product of 3 and 5.
Question 6
1 / -0

Common factors of 15 and 25 are

A
5

B
75

C
15

D
25

Solution

Explanation:

15 = 3 x 5 and 25 = 5 x 5. Common factor of both numbers is 5.
Question 7
1 / -0

Two numbers having only 1 as common factor are called

A
prime numbers

B
Composite numbers

C
Odd numbers

D
Co-prime numbers

Solution

Explanation:

Two numbers are coprime if their highest common factor (or greatest common divisor if you must) is 1. You can have the set of positive integers which are coprime to a given number: for example those coprime to 12 are 1,5,7,11,13. etc.
Question 8
1 / -0

A number is divisible by 4 if its

A
last two digits are divisible by 4

B
last digit is 4

C
last digit is 0

D
last digit is 8

Solution

Explanation:

The Divisibility Rule for 4 states that - If the last two digits of a whole number are divisible by 4, then the entire number is divisible by 4.
Question 9
1 / -0

Which of the following number is divisible by 3?

A
122

B
123

C
123

D
124

Solution

Explanation:

3 divides 123 number 41 times

i.e., 3 x 41 = 123 or 123 / 3 = 41
Question 10
1 / -0

If a number is divisible by 2 and 3 both then is divisible by

A
7

B
5

C
3

D
6

Solution

Explanation:

The number should be divisible by 6.

If any number is divisible by two numbers then is should be divisible by the product of same two numbers.

For.ex. 20 is divisible by 4 and 5 and 20 is also divisible by 20 (4 x 5)

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Re-Attempt Weekly Quiz Competition

Playing with Numbers Test - 1

Result

Playing with Numbers Test - 1

Score

-

Rank

-

SHARING IS CARING

Question 1

4

1

3

2

Solution

Question 2

9

3

6

8

Solution

Question 3

30

18

24

12

Solution

Question 4

6

3

5

17

Solution

Question 5

quotient also

sum also

product also

difference also

Solution

Question 6

5

75

15

25

Solution

Question 7

prime numbers

Composite numbers

Odd numbers

Co-prime numbers

Solution

Question 8

last two digits are divisible by 4

last digit is 4

last digit is 0

last digit is 8

Solution

Question 9

122

123

123

124

Solution

Question 10

7

5

3

6

Solution

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