show that every integer greater than 11 is the sum of two composite integers

True/False: Every integer greater than 1 is divisible by a prime number. True False

Prove the “rule of 9”: an integer is divisible by 9 if and only if the sum of its digits is divisible by 9

Select each expression that has a sum of 4 4/12 3 1/5 + 1 3/7 1 11/12 + 2 1/4 1 3/6 + 1 1/2 + 1 3/4 1 1/3 + 1 1/2 + 1 2/4 3/6 + 1 2/4 + 2 1/3