Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 722 · 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.What comes next? 14, 20, 26, 32, ? (a) 39 (b) 32 (c) 44 (d) 38
2. 2.Think of 3. Multiply it by 5, then add 5. What number do you end with?
3. 3.462? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
4. 4.2 × 100 =
5. 5.9 × 1 =
6. 6.Half of 196 =
7. 7.37 × 3 =
8. 8.What comes next? 9, 16, 25, 36, ? (a) 47 (b) 50 (c) 51 (d) 49
9. 9.37 × 24 =
10. 10.I thought of a number, multiplied it by 5 and added 6. I got 16. What was my number?
11. 11.39? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
12. 12.1 + 2 + 3 + … + 90 =
13. 13.9 × 8 = ?2 — what is the missing digit?
14. 14.Magic square (every row, column and diagonal has the same total): 7 6 11 | ? 8 4 | 5 10 9. What is the missing number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
16. 16.Half of 42 =
17. 17.49 × 1000 =
18. 18.92 × 100 =
19. 19.What comes next? 13, 16, 19, 22, ? (a) 28 (b) 26 (c) 25 (d) 22
20. 20.Take 92 and take away the sum of its digits. What do you get?
21. 21.11111 × 11111 =
22. 22.19 × 4 =
23. 23.10 × 9 =
24. 24.Magic square (every row, column and diagonal has the same total): 7 ? 11 | 14 10 6 | 9 8 13. What is the missing number?
25. 25.9 × 10 =
26. 26.5 × 9 =
27. 27.You have 9 coins. Each coin is ₹1 or ₹2, and together they make ₹11. How many ₹2 coins do you have?
28. 28.18 × 4 =
29. 29.Odd one out: which number is NOT in the 8 times table? (a) 32 (b) 64 (c) 75 (d) 40
30. 30.40 × ? = 40000
31. 31.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 19 and take away the sum of its digits. What do you get?
33. 33.30 × 4 =
34. 34.I thought of a number, added 9 and then doubled it. I got 24. What was my number?
35. 35.In 5 years a boy will be 18 years old. How old was he 5 years ago?
36. 36.Magic square (every row, column and diagonal has the same total): 18 20 10 | 8 16 24 | ? 12 14. What is the missing number?
37. 37.9 × 3 =
38. 38.9 × 7 = 6? — what is the missing digit?
39. 39.Think of 8. Multiply it by 4, then add 2. What number do you end with?
40. 40.Magic square (every row, column and diagonal has the same total): 30 15 18 | 9 21 33 | ? 27 12. What is the missing number?

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