Question

The sum of two digits of a 2 digit number is 9 . If the digit in the unit’s place is ‘b’ .Then the two
digit number is

a)90 +9b b) 90b – 9 c) 9 + 90b d) 90 - 9b .​

Answer 1

Answer:

Let one's digit = x

And, ten's digit = y

Therefore, number is 10y+x.

According to the question,

x+y=9 ....(1)

Also,

10y+x+27=10x+y

x−y=3 ......(2)

Solving equation 1 & 2, we get,

x=6 and y=3.

Hence, the original number is 10y+x=36.

Step-by-step explanation:

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