1. what is the two-digit number that is divisible by both the sum and the product of its digits
2. one of the two numbers that can be both the area and perimeter of a triangle whose side lengths are a Pythagorean triple
3. the smaller of two triangular numbers whose sum and difference are also triangular numbers
thanks!
2. one of the two numbers that can be both the area and perimeter of a triangle whose side lengths are a Pythagorean triple
3. the smaller of two triangular numbers whose sum and difference are also triangular numbers
thanks!