Question

The product of two digit number is 1431. The product of their ten's digit is 10 and the product of their unit's digits is 21. Find the number.

Answer 1

Answer:-

Let the two digit number be x + 10y

According to the question,

10y = 10

y = 10/10

y = 1

x = 21

Hence the number is

21 + 10

= 31