1) Find the number of 5-lists of the form (21, 22, 23, 24, 25), where each r, is a nonnegative integer and x₁ + x₂ + x3 + x₁ + 3x5 = 12.

Q: what two consective odd integers have a product of 63?

A: Find two odd integers.

Q: Prove that a four-digit number is a multiple of 8 whenever the number formed by the first three…

A: The solution is given by using the expanded form of number as follows

Q: 9) The dimensions of a gift box are consecutive positive integers such that the height is the least…

A:

Q: 20) Show that the sum of two consecutive integers is always odd.

A: Let x be any integer. Then its consecutive integer can be written as x+1.

Q: How many nonnegative integer solutions are there of the equation x1 +x2 +x3 =18?

A: