Number Play Class 8 Very Short Question Answer

Number Play Class 8 Very Short Question Answer

Number Play Class 8 Very Short Question Answer

Question 1.

What is the parity of -5 + 6 - 7 + 8

Solution:

In between four consecutive numbers + and - signs have been placed. So, parity of this expression is even.

Question 2.

What is the parity of the sum of a multiple of 4 and an even number, which is not a multiple of 4 ?

Solution:

Clearly sum like 8 + 2 = 10, or 12 + 6 = 18, or 8 + 14 = 20, etc. are even numbers.

So, this parity is even.

Question 3.

Is the number 546 divisible by 3 ?

Solution:

Sum of the digits = 5 + 4 + 6 = 15,

which is divisible by 3. So, 546 is divisible by 3.

Question 4.

Find the digital root of 9087.

Solution:

9 + 0 + 8 + 7 = 24 and 2 + 4 = 6. So, the required digit root is 6.

Question 5.

Find whether 14 is divisible by 4.

Solution:

14 = 4 × 3 + 2. Thus, 14 is not a multiple

of 4. Hence, 14 is not divisible by 4.