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rajat chaudhary

· started a discussion

· 1 Months ago

quant question (Question:234072.0)

q.65 why we take the number as (10x+Y)

Question:

If the difference between two digit number and the number obtained by reversing the digits of previous number is 27, then the difference in both the digits of the number will be:

Options:
A) 7
B) 5
C) 3
D) 9
E) 8
Solution:

Ans: (c) Let the number be (10x + y)

A.T.Q.,

(10x + y) – (10y + x) = 27 \(\Rightarrow\) 9x – 9y = 27 \(\Rightarrow\) x – y = 3

Knowledge Expert

· commented

· 1 Months ago

Dear student,
Because in 27, 2 is at the place of 10th digit and 7 is the unit digit.
Keep learning,
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