1.

The sum of the digits of a two digit number is 14. If 18 is subtracted from the number, digits are reversed. Find the number(1) 86 (2) 77 (3) 68 (4) 76

Answer»

Correct option: (1) 86

Explanation:

N = 10x + y        N’ = 10y + x

x + y = 14 _____ (1)

N – 18 = N’

(10x + y) – 18 = 10y + x

9(x – y) = 18

x – y = 2 _____(2)

from (1) & (2) we get x = 8 & y = 6

N = 86



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