The product of the digits of a two-digit number is 36. If 45 is subtracted from the number, then the digits interchange mutually. The number is

The value of a 2-digit number is 5 times the sum of the digits. What is the product of the digits ?

A 2-digit number is such that the sum of the number and the number obtained by reversing the order of the digits of the number is 55. Further, the difference of the given number and the number obtain…

The sum of squares of two positive integers is 1025 and difference of their squares is 225. What percent is the difference of the numbers of their product?

Seven times a two-digit positive number is equal to four times the number obtained by reversing the order of the digits. How many such two-digit numbers are there?

What are the two natural numbers whose product is 2400 and the sum of whose squares is 5200?