Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 368 · 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.A girl is 6 years old and her brother is 5 years older. How old will her brother be in 4 years?
2. 2.9 × 3 = 2? — what is the missing digit?
3. 3.1111 × 1111 =
4. 4.Magic square (every row, column and diagonal has the same total): ? 11 12 | 9 13 17 | 14 15 10. What is the missing number?
5. 5.693 + 396 =
6. 6.Double 58 =
7. 7.722? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
8. 8.9 × 5 = ?5 — what is the missing digit?
9. 9.What comes next? 4, 8, 16, 32, ? (a) 48 (b) 64 (c) 65 (d) 56
10. 10.13 × 4 =
11. 11.What comes next? 1, 2, 4, 8, ? (a) 14 (b) 17 (c) 16 (d) 12
12. 12.Magic square (every row, column and diagonal has the same total): 27 6 21 | 12 18 24 | 15 30 ?. What is the missing number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
15. 15.Magic square (every row, column and diagonal has the same total): 16 ? 24 | 26 18 10 | 12 22 20. What is the missing number?
16. 16.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
17. 17.1234567 × 8 + 7 =
18. 18.1 + 2 + 3 + … + 18 =
19. 19.11 × 11 =
20. 20.1 + 2 + 3 + … + 78 =
21. 21.The 7th of a month is a Wednesday. What day is the 26th of the same month? (a) Monday (b) Thursday (c) Sunday (d) Tuesday
22. 22.1 + 3 + 5 + … + 21 =
23. 23.3 × 1000 =
24. 24.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.37 × 27 =
26. 26.50 × 1000 =
27. 27.30 × 4 =
28. 28.10 × 4 =
29. 29.1 + 3 + 5 + … + 19 =
30. 30.Double 38 =
31. 31.46 × 1000 =
32. 32.9 × 8 = 7? — what is the missing digit?
33. 33.31 × 1000 =
34. 34.1 + 2 + 3 + … + 72 =
35. 35.Half of 46 =
36. 36.37 × 21 =
37. 37.9 × 9 = ?1 — what is the missing digit?
38. 38.2 × 9 =
39. 39.A girl is 9 years old and her brother is 3 years older. How old will her brother be in 3 years?
40. 40.677? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?

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