Question

the sum of two digits of a two digit number is 4. the digit at tens place is three times the digit at ones place find the number​

Answer 1

Answer:

31

Step-by-step explanation:

let unit digit = a and tens digit = b

the number = 10b + a

given, a + b = 4 ----(1)

and b = 3a

putting b in (1),

a + b = 4

=> a + 3a = 4

=> 4a = 4

=> a = 1

=> b = 3a = 3

the number = 10b + a = 10×3 + 1 = 31