Question

write all the factors of 40. use commas to separate them.

Explanation:

Step1: Recall factor definition

A factor of a number \( n \) is an integer that divides \( n \) without leaving a remainder.

Step2: Start with 1 and 40

\( 1\times40 = 40 \), so 1 and 40 are factors.

Step3: Check 2

\( 40\div2 = 20 \), so 2 and 20 are factors.

Step4: Check 3

\( 40\div3\approx13.33 \), not an integer, so 3 is not a factor.

Step5: Check 4

\( 40\div4 = 10 \), so 4 and 10 are factors.

Step6: Check 5

\( 40\div5 = 8 \), so 5 and 8 are factors.

Step7: Check 6

\( 40\div6\approx6.67 \), not an integer, so 6 is not a factor.

Step8: Check 7

\( 40\div7\approx5.71 \), not an integer, so 7 is not a factor.

Step9: Check 8 (already found from 4×10)

After 5, the next number would repeat previous pairs (e.g., 8×5 is same as 5×8), so we stop.

Answer:

1, 2, 4, 5, 8, 10, 20, 40