1, 4, 6 and 7. Mononomials are equations that only have one kind of number or value. Take number 2 for example. If you see b as a banana, and the number 2 as an apple, you can’t add the two together because they just don’t fit as equals. The answer to that equation gives you another polynomial (3b+2). Number 1 on the other hand, they’re both apples. Therefore you can add them together and get a sum of 2 apples (another mononomial)