Question

in a 2- digit number, the unit digit is four times the tens digit and the sum of the digit is 10.Fibd the number

Answer 1

Let the tens digit be x and unit digit be 4x
Now,x+4x=10
=5x=10
= x=2

Therefore the tens digit is 2 and ones digit is 8
And the no. is 28

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Answer 2

Tenth digit be x
Therefore unit digit is 4x
Acc to question»» 4x+x=10
Therefore x=2
Therefore number is 10x+4x
=20+8
=28(ans)