Back to worksheetsMathsAges 7-9
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 15 squared (15²)?
2. What is 6 squared (6²)?
3. What is 19 squared (19²)?
4. What is the positive square root of 144 (√144)?
5. What is 3 squared (3²)?
6. What is the positive square root of 256 (√256)?
7. What is the positive square root of 81 (√81)?
8. What is 12 squared (12²)?
9. What is 20 squared (20²)?
10. What is the positive square root of 9 (√9)?
11. What is the positive square root of 36 (√36)?
12. What is the positive square root of 49 (√49)?
12 questions · Seed 104732 · 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 15 squared (15²)?
22515² means 15 × 15 = 225.
2. What is 6 squared (6²)?
3. What is 19 squared (19²)?
36119² means 19 × 19 = 361.
4. What is the positive square root of 144 (√144)?
12Since 12 × 12 = 144, √144 = 12.
5. What is 3 squared (3²)?
6. What is the positive square root of 256 (√256)?
16Since 16 × 16 = 256, √256 = 16.
7. What is the positive square root of 81 (√81)?
9Since 9 × 9 = 81, √81 = 9.
8. What is 12 squared (12²)?
14412² means 12 × 12 = 144.
9. What is 20 squared (20²)?
40020² means 20 × 20 = 400.
10. What is the positive square root of 9 (√9)?
3Since 3 × 3 = 9, √9 = 3.
11. What is the positive square root of 36 (√36)?
6Since 6 × 6 = 36, √36 = 6.
12. What is the positive square root of 49 (√49)?
7Since 7 × 7 = 49, √49 = 7.
12 questions · Seed 104732 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9
Square numbers & square roots
Take your time. Show your thinking.
1. What is 15 squared (15²)?
2. What is 6 squared (6²)?
3. What is 19 squared (19²)?
4. What is the positive square root of 144 (√144)?
5. What is 3 squared (3²)?
6. What is the positive square root of 256 (√256)?
7. What is the positive square root of 81 (√81)?
8. What is 12 squared (12²)?
9. What is 20 squared (20²)?
10. What is the positive square root of 9 (√9)?
11. What is the positive square root of 36 (√36)?
12. What is the positive square root of 49 (√49)?
12 questions · Seed 104732 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9
Square numbers & square roots
Answers and reasoning. Review before teaching.
1. What is 15 squared (15²)?
22515² means 15 × 15 = 225.
2. What is 6 squared (6²)?
3. What is 19 squared (19²)?
36119² means 19 × 19 = 361.
4. What is the positive square root of 144 (√144)?
12Since 12 × 12 = 144, √144 = 12.
5. What is 3 squared (3²)?
6. What is the positive square root of 256 (√256)?
16Since 16 × 16 = 256, √256 = 16.
7. What is the positive square root of 81 (√81)?
9Since 9 × 9 = 81, √81 = 9.
8. What is 12 squared (12²)?
14412² means 12 × 12 = 144.
9. What is 20 squared (20²)?
40020² means 20 × 20 = 400.
10. What is the positive square root of 9 (√9)?
3Since 3 × 3 = 9, √9 = 3.
11. What is the positive square root of 36 (√36)?
6Since 6 × 6 = 36, √36 = 6.
12. What is the positive square root of 49 (√49)?
7Since 7 × 7 = 49, √49 = 7.
12 questions · Seed 104732 · Age guidance, not curriculum certification