RS Aggarwal Class 8 Solutions Chapter 5 Playing with Numbers Ex 5D

These Solutions are part of RS Aggarwal Solutions Class 8. Here we have given RS Aggarwal Solutions Class 8 Chapter 5 Playing with Numbers Ex 5D.

Other Exercises

Question 1.
Solution:
5×6 is exactly divisible by 3
Sum of its digits must be divisible by 3
5 + x + 6 = 11 + x is divisible by 3
Least value of x = 1 as 12 is divisible by 3 (b)

Question 2.
Solution:
64y8 is exactly divisible by 3 then the sum of its digits must be divisible by 3
6 + 4 + y + 8 or 18 + y is divisible by 3
Least value of y = 0
18 is divisible by 3 (a)

Question 3.
Solution:
7 x 8 is exactly divisible by 9
Sum of its digits must be divisible by 9
7 + x + 8 = 15 + x must be divisible by 9
Least value of x = 3 as 15 + 3 = 18 is divisible by 9 (c)

Question 4.
Solution:
37y4 is exactly divisible by 9
The sum of its digits must be divisible by
3 + 7 + y + 4 or 14 + y is divisible by 9
Least value of y = 4
As 14 + 4 = 18 is divisible by 9 (d)

Question 5.
Solution:
4xy7 is exactly divisible by 3
The sum of its digits must be divisible by 9
or 4 + x + y + 7 or 11 + (x + y) is divisible by 9
Least value of x + y = 7
as 11 + 7 = 18 is divisible by 9 (d)

Question 6.
Solution:
x7y5 is exactly divisible by 3
Sum of its digits must be divisible by 3
x + 7 + y + 512 + (x + y) is divisible by 3
Least value of x + y = 0 as
12 + 0 = 12 is divisible by 3 (b)

Question 7.
Solution:
x4y5z is exactly divisible by 9
The sum of its digits must be divisible by 9
x + 4 + y + 5 + z or 9 + (x + y + z) must be divisible by 9
Least value of x + y + z = 0 as 9 + 0 = 9 is divisible by 9 (d)

Question 8.
Solution:
A2B5 is exactly divisible by 9
Sum of its digits must be divisible by 9
A + 2 + B + 5 = 7 + A + B is divisible by 9
Least value of A + B = 2 as 7 + 2 = 9 is divisible by 9

Question 9.
Solution:
x27y is exactly divisible by 9
The sum of its digits must be divisible by 9
x + 2 + 7 + y = x + y + 9 is divisible by 9
Least value of x + y = 0 as 0 + 99 is exactly divisible by 9 (a)

Hope given RS Aggarwal Solutions Class 8 Chapter 5 Playing with Numbers Ex 5D are helpful to complete your math homework.

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