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Square numbers & square roots
Evaluate whole-number squares (n²) and find exact positive square roots (√n). Review suitability for your learners before teaching.
Worksheet StudioPractice pack · Ages 7-9
Square numbers & square roots
Take your time. Show your thinking.
1. What is the positive square root of 225 (√225)?
2. What is 9 squared (9²)?
3. What is the positive square root of 25 (√25)?
4. What is 17 squared (17²)?
5. What is the positive square root of 324 (√324)?
6. What is the positive square root of 169 (√169)?
7. What is 6 squared (6²)?
8. What is 7 squared (7²)?
9. What is 20 squared (20²)?
10. What is the positive square root of 36 (√36)?
11. What is the positive square root of 121 (√121)?
12. What is 5 squared (5²)?
12 questions · Seed 51 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 7-9
Square numbers & square roots
Answers and reasoning. Review before teaching.
1. What is the positive square root of 225 (√225)?
15Since 15 × 15 = 225, √225 = 15.
2. What is 9 squared (9²)?
3. What is the positive square root of 25 (√25)?
5Since 5 × 5 = 25, √25 = 5.
4. What is 17 squared (17²)?
28917² means 17 × 17 = 289.
5. What is the positive square root of 324 (√324)?
18Since 18 × 18 = 324, √324 = 18.
6. What is the positive square root of 169 (√169)?
13Since 13 × 13 = 169, √169 = 13.
7. What is 6 squared (6²)?
8. What is 7 squared (7²)?
9. What is 20 squared (20²)?
40020² means 20 × 20 = 400.
10. What is the positive square root of 36 (√36)?
6Since 6 × 6 = 36, √36 = 6.
11. What is the positive square root of 121 (√121)?
11Since 11 × 11 = 121, √121 = 11.
12. What is 5 squared (5²)?
12 questions · Seed 51 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9
Square numbers & square roots
Take your time. Show your thinking.
1. What is the positive square root of 225 (√225)?
2. What is 9 squared (9²)?
3. What is the positive square root of 25 (√25)?
4. What is 17 squared (17²)?
5. What is the positive square root of 324 (√324)?
6. What is the positive square root of 169 (√169)?
7. What is 6 squared (6²)?
8. What is 7 squared (7²)?
9. What is 20 squared (20²)?
10. What is the positive square root of 36 (√36)?
11. What is the positive square root of 121 (√121)?
12. What is 5 squared (5²)?
12 questions · Seed 51 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9
Square numbers & square roots
Answers and reasoning. Review before teaching.
1. What is the positive square root of 225 (√225)?
15Since 15 × 15 = 225, √225 = 15.
2. What is 9 squared (9²)?
3. What is the positive square root of 25 (√25)?
5Since 5 × 5 = 25, √25 = 5.
4. What is 17 squared (17²)?
28917² means 17 × 17 = 289.
5. What is the positive square root of 324 (√324)?
18Since 18 × 18 = 324, √324 = 18.
6. What is the positive square root of 169 (√169)?
13Since 13 × 13 = 169, √169 = 13.
7. What is 6 squared (6²)?
8. What is 7 squared (7²)?
9. What is 20 squared (20²)?
40020² means 20 × 20 = 400.
10. What is the positive square root of 36 (√36)?
6Since 6 × 6 = 36, √36 = 6.
11. What is the positive square root of 121 (√121)?
11Since 11 × 11 = 121, √121 = 11.
12. What is 5 squared (5²)?
12 questions · Seed 51 · Age guidance, not curriculum certification