Question Determine which numbers (721, 720, 372) are divisible by 10, 5, or 2.
Studdy Solution
STEP 1
Assumptions
1. To determine divisibility by 10, a number must end in 0.
2. To determine divisibility by 5, a number must end in 0 or 5.
3. To determine divisibility by 2, a number must be even, which means it ends in 0, 2, 4, 6, or 8.
STEP 2
Examine each number to determine if it is divisible by 10.
(a) Divisibility by 10:
- 721 does not end in 0, so it is not divisible by 10.
- 720 ends in 0, so it is divisible by 10.
- 372 does not end in 0, so it is not divisible by 10.
STEP 3
Mark the answers for divisibility by 10.
- 721: Not divisible by 10, so do not mark.
- 720: Divisible by 10, so mark the square.
- 372: Not divisible by 10, so do not mark.
STEP 4
Examine each number to determine if it is divisible by 5.
(b) Divisibility by 5:
- 721 ends in 1, so it is not divisible by 5.
- 720 ends in 0, so it is divisible by 5.
- 372 ends in 2, so it is not divisible by 5.
STEP 5
Mark the answers for divisibility by 5.
- 721: Not divisible by 5, so do not mark.
- 720: Divisible by 5, so mark the square.
- 372: Not divisible by 5, so do not mark.
STEP 6
Examine each number to determine if it is divisible by 2.
(c) Divisibility by 2:
- 721 ends in 1, which is odd, so it is not divisible by 2.
- 720 ends in 0, which is even, so it is divisible by 2.
- 372 ends in 2, which is even, so it is divisible by 2.
STEP 7
Mark the answers for divisibility by 2.
- 721: Not divisible by 2, so do not mark.
- 720: Divisible by 2, so mark the square.
- 372: Divisible by 2, so mark the square.
STEP 8
Fill in the final table with the marked answers.
\begin{tabular}{|l|c|c|c|c|}
\hline & 721 & 720 & 372 & None of these \\
\hline (a) Which numbers are divisible by 10? & & \checked & & \\
\hline (b) Which numbers are divisible by 5? & & \checked & & \\
\hline (c) Which numbers are divisible by 2? & & \checked & \checked & \\
\hline
\end{tabular}
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