Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 131 · 40 questions

The trick (Choose a trick): × 9 → finger trick; × 4 → double double; × 10, 100, 1000 → slide and add zeros. 37, 12345679 or 111… → magic patterns; reverse and subtract → 1089. Puzzles: find the rule, the total or the leftover days, then check your answer.

1. 1.1 + 2 + 3 + … + 47 =
2. 2.Magic square (every row, column and diagonal has the same total): 24 14 16 | 10 ? 26 | 20 22 12. What is the missing number?
3. 3.20 × 4 =
4. 4.The 5th of a month is a Saturday. What day is the 27th of the same month? (a) Sunday (b) Saturday (c) Monday (d) Wednesday
5. 5.Magic square (every row, column and diagonal has the same total): 12 ? 10 | 11 13 15 | 16 9 14. What is the missing number?
6. 6.37 × ? = 370
7. 7.The 6th of a month is a Sunday. What day is the 29th of the same month? (a) Wednesday (b) Monday (c) Friday (d) Tuesday
8. 8.1 + 2 + 3 + … + 8 =
9. 9.Double 51 =
10. 10.The 4th of a month is a Sunday. What day is the 24th of the same month? (a) Saturday (b) Sunday (c) Tuesday (d) Friday
11. 11.9 × 2 = ?8 — what is the missing digit?
12. 12.Magic square (every row, column and diagonal has the same total): 19 9 ? | 5 13 21 | 15 17 7. What is the missing number?
13. 13.Magic trick! Think of 6. Double it, add 12, halve it, then take away 6. What number do you get?
14. 14.Magic square (every row, column and diagonal has the same total): 27 30 ? | 12 24 36 | 33 18 21. What is the missing number?
15. 15.A piggy bank has 5 coins of ₹5 and 3 coins of ₹2. How many rupees are in it?
16. 16.3 × 9 =
17. 17.Odd one out: which number is NOT in the 7 times table? (a) 42 (b) 14 (c) 21 (d) 23
18. 18.9 × 6 = ?4 — what is the missing digit?
19. 19.Half of 84 =
20. 20.Magic square (every row, column and diagonal has the same total): 24 10 20 | ? 18 22 | 16 26 12. What is the missing number?
21. 21.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.1 + 2 + 3 + … + 99 =
23. 23.14 × 4 =
24. 24.9 × 8 =
25. 25.61? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
26. 26.A girl is 12 years old and her brother is 3 years older. How old will her brother be in 9 years?
27. 27.9 × 7 =
28. 28.Magic square (every row, column and diagonal has the same total): 11 9 19 | 21 13 ? | 7 17 15. What is the missing number?
29. 29.What comes next? 3, 6, 12, 24, ? (a) 49 (b) 36 (c) 48 (d) 42
30. 30.25 × ? = 25000
31. 31.Magic square (every row, column and diagonal has the same total): 15 10 17 | 16 14 12 | ? 18 13. What is the missing number?
32. 32.198? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
33. 33.Magic square (every row, column and diagonal has the same total): 17 27 13 | 15 ? 23 | 25 11 21. What is the missing number?
34. 34.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.46 × 4 =
36. 36.A father is 41 years old and his son is 5. How old was the father when the son was born?
37. 37.5?33 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
38. 38.7 × 9 =
39. 39.In 2 years a boy will be 14 years old. How old was he 2 years ago?
40. 40.Magic square (every row, column and diagonal has the same total): 2 9 4 | 7 5 3 | 6 1 ?. What is the missing number?

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