Question

In a 2-digit number, digit in units place is twice the digit in tens place. If 27 is added to it ,digits are reversed. Find the number. ​

Answer 1

Answer:

Lets take the no. in one's place =x

Lets take the no. in ten's place =y

so the number is = 10y+x

x=2y

27+10y+x=10x+y

27=9x-9y

3=x-y

IF we put x=2y in eq.

3=2y-y

3=y

x=6

the no. is 36

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