Foundations of Math - Week 10 - Divisibility

Is 72 divisible by 2?

• No, because it’s odd.

• Yes, because it’s even.

Is 27 divisible by 3?

• No, because 2 + 7 = 9, and 9 is not divisible by 3.

• Yes, because 2 + 7 = 9, and 9 is divisible by 3.

Is 48 divisible by 4?

Is 85 divisible by 5?

• Yes, because it ends in 5.

• No, because it ends in 0.

Is 66 divisible by 6?

• No, because it’s not divisible by 2 and 3.

Is 56 divisible by 7?

Is 256 divisible by 8?

Is 90 divisible by 9?

Is 150 divisible by 10?

• No, because it doesn’t end in 0.

• Yes, because it ends in 0.

Is 33 divisible by 5?

• No, because it doesn’t end in 0 or 5.

• Yes, because it ends in 3.