Question

in a two digit number the unit digit is 4 times the 10 digit and the sum of the digit is 10 find the number

Answer 1

let tens digit be x then units digit will be 4x
also sum of digits is 10
so
x+4x=10
5x=10
x=2

the tens digit will be x=2 and the units digit =4x=4×2=8

so the no is 28



hope it helps