Problems based on Numbers Test 6

Question : 37 of 40

Marks: +1, -0

A number of two digits has 3 for its unit's digit, and the sum of digits is

1 /7

of the number itself. What is the number?

Solution:

Let the digit at the ten's place be x;
then, number = 10x + 3
Now,

x + 3 =1/7( 10x +3)

⇒ 7x + 21 = 10x + 3

⇒ 3x = 18

∴ x = 6

Hence, number

= 10 × 6 + 3 = 63

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