Question

a 2 digit number is such that the digit at the once place is one more than twice of the digit at the tens place.if the sum of both the digit is 10 find the number

Answer 1

Let the ten's digit be x. Then, unit's digit = 2x +1.(Given)

Given, sum of both digits is 10

=> (2x+1)+x =10

3x=9(opening bracket and adding)

x=3

Unit digit=7 (2x+1)

So, ten's digit = 3 and unit's digit = 7. Hence, original number = 37