Let’s go through each question step by step. Remember: a square number is when you multiply a number by itself — like 3 × 3 = 9, so 9 is the square of 3.
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1. 2² = ?
2 × 2 =
4
2. 3² = ?
3 × 3 =
9
3. 4² = ?
4 × 4 =
16
4. 5² = ?
5 × 5 =
25
5. 6² = ?
6 × 6 =
36
6. 7² = ?
7 × 7 =
49
7. 8² = ?
8 × 8 =
64
8. 9² = ?
9 × 9 =
81
9. 10² = ?
10 × 10 =
100
10. 11² = ?
11 × 11 =
121
11. 12² = ?
12 × 12 =
144
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Now for questions 12–21, we’ll calculate each square first, then do the addition or subtraction.
12. 5² – 2² = ?
5² = 25, 2² = 4 → 25 – 4 =
21
13. 5² + 2² = ?
5² = 25, 2² = 4 → 25 + 4 =
29
14. 8² – 4² = ?
8² = 64, 4² = 16 → 64 – 16 =
48
15. 3² + 9² = ?
3² = 9, 9² = 81 → 9 + 81 =
90
16. 6² – 2² = ?
6² = 36, 2² = 4 → 36 – 4 =
32
17. 11² + 4² = ?
11² = 121, 4² = 16 → 121 + 16 =
137
18. 10² – 9² = ?
10² = 100, 9² = 81 → 100 – 81 =
19
19. 10² + 12² = ?
10² = 100, 12² = 144 → 100 + 144 =
244
20. 4² – 2² = ?
4² = 16, 2² = 4 → 16 – 4 =
12
21. 7² + 12² = ?
7² = 49, 12² = 144 → 49 + 144 =
193
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Final Answer:
1. 4
2. 9
3. 16
4. 25
5. 36
6. 49
7. 64
8. 81
9. 100
10. 121
11. 144
12. 25 – 4 = 21
13. 25 + 4 = 29
14. 64 – 16 = 48
15. 9 + 81 = 90
16. 36 – 4 = 32
17. 121 + 16 = 137
18. 100 – 81 = 19
19. 100 + 144 = 244
20. 16 – 4 = 12
21. 49 + 144 = 193
Parent Tip: Review the logic above to help your child master the concept of square number worksheet.
