Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 629 · 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? 5, 9, 13, 17, ? (a) 21 (b) 22 (c) 17 (d) 25
2. 2.9 × 5 = ?5 — what is the missing digit?
3. 3.48 × 4 =
4. 4.9 × 8 = ?2 — what is the missing digit?
5. 5.Magic square (every row, column and diagonal has the same total): 16 11 ? | 9 13 17 | 14 15 10. What is the missing number?
6. 6.21 × 1000 =
7. 7.Magic square (every row, column and diagonal has the same total): 12 7 ? | 13 11 9 | 8 15 10. What is the missing number?
8. 8.You have 5 coins. Each coin is ₹1 or ₹2, and together they make ₹7. How many ₹2 coins do you have?
9. 9.Take 63 and take away the sum of its digits. What do you get?
10. 10.1 + 2 + 3 + … + 46 =
11. 11.4 × 1000 =
12. 12.The 2nd of a month is a Wednesday. What day is the 29th of the same month? (a) Wednesday (b) Friday (c) Tuesday (d) Monday
13. 13.957 × ? = 9570
14. 14.1 + 2 + 3 + … + 97 =
15. 15.Think of 15. Multiply it by 3, then add 8. What number do you end with?
16. 16.12345679 × 36 =
17. 17.Take 47 and take away the sum of its digits. What do you get?
18. 18.86 × 100 =
19. 19.If today is Saturday, what day was it 54 days ago? (a) Thursday (b) Tuesday (c) Monday (d) Sunday
20. 20.15 × 1000 =
21. 21.What comes next? 4, 8, 16, 32, ? (a) 48 (b) 65 (c) 64 (d) 56
22. 22.9 × 7 =
23. 23.If today is Sunday, what day was it 29 days ago? (a) Saturday (b) Sunday (c) Tuesday (d) Friday
24. 24.Take 62 and take away the sum of its digits. What do you get?
25. 25.9 × 8 =
26. 26.?025 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
27. 27.51 × 100 =
28. 28.5 × 9 =
29. 29.The 2nd of a month is a Friday. What day is the 21st of the same month? (a) Saturday (b) Thursday (c) Wednesday (d) Tuesday
30. 30.What comes next? 2, 4, 6, 8, ? (a) 8 (b) 11 (c) 12 (d) 10
31. 31.The ages of two twins add up to 16. How old is each twin?
32. 32.18 × 4 =
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
34. 34.What comes next? 1, 4, 9, 16, ? (a) 27 (b) 23 (c) 26 (d) 25
35. 35.449 × 10 =
36. 36.9 × 4 = 3? — what is the missing digit?
37. 37.Magic square (every row, column and diagonal has the same total): 7 14 9 | 12 10 8 | 11 ? 13. What is the missing number?
38. 38.25 × ? = 25000
39. 39.Take 97 and take away the sum of its digits. What do you get?
40. 40.Double 24 =

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