Year 5 Square and Cube Numbers Worksheet — Level 1 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 5 factors, multiples & primes worksheet.
Success TutoringWorksheetsAnswer sheetYear 5 · Mathematics · Factors, Multiples & PrimesYear 5 Square and Cube Numbers Worksheet — Level 1 — Practice Set 2 — Answers
A square number is a number times itself; a cube number is a number times itself three times.
1.52 = (answer space)
Answer: 25
- 5 × 5 = 25
2.√4 = (answer space)
Answer: 2
- 2 × 2 = 4
3.99 is a square number.
Answer: False
92 = 81 and 102 = 100, so 99 is not a square number.
4.62 = (answer space)
Answer: 36
- 6 × 6 = 36
5.√121 = (answer space)
Answer: 11
- 11 × 11 = 121
6.86 is a square number.
Answer: False
92 = 81 and 102 = 100, so 86 is not a square number.
7.92 = (answer space)
Answer: 81
- 9 × 9 = 81
8.√16 = (answer space)
Answer: 4
- 4 × 4 = 16
9.100 is a square number.
Answer: True
10 × 10 = 100
10.112 = (answer space)
Answer: 121
- 11 × 11 = 121
11.√64 = (answer space)
Answer: 8
- 8 × 8 = 64
12.20 is a square number.
Answer: False
42 = 16 and 52 = 25, so 20 is not a square number.
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.