Question

The one's digit of a two digit number is double the digit in the tens place. If the sum of the digits
is 9, find the number.​

Answer 1

Answer:

let the digit at tens place be x

and the digit at ones place be 2x

according to the question

x + 2x = 9

3x =9

x=9/3

x=3

digit at tense place = x = 3

digit at onces place = 2x = 6

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Hence, the number is 36