A) 62
B) 73
C) 84
D) 51
Correct Answer: B
Solution :
Let the two digit number be 10 x + y Reversing the digit, number become 10 y + x. sum = 10 x + y + 10y + x \[\Rightarrow \] 11x + 11y = 110 \[\Rightarrow \] x + y = 10 ?(1) x - y = 4 (Given) ?(2) From equ. (1) & (2) \[2x=14\Rightarrow x=7\] \[\therefore \] y = 3 Hence the number is 73.You need to login to perform this action.
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