M4maths Previous Puzzles

04 Mar 2014 Find the number

A number consists of two digits whose sum is 9. The number obtained by reversing the order of the digits of the given number exceeds the given number by 27. Find the given number.

OPtion

1) 63
2) 72
3) 54
4) 27
5) 36
6) 45
7) 18
8) 46
9) 81
10)None of these

Solution

Let the tens digit of the number be x and its units digit be y.
By the question
x+y = 9 (i)
and
y-x = 3 (ii)
On solving (i) and (ii) we get y=6 and x =3
10x+y = 10*3+6 = 36
option 5)

Correct Option: 5 Best Solution (0)