Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 868 · 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. 1.9 × 5 = ?5 — what is the missing digit?
2. 2.9 × 10 = ?0 — what is the missing digit?
3. 3.What comes next? 1, 2, 4, 8, ? (a) 16 (b) 12 (c) 17 (d) 14
4. 4.12 × 4 =
5. 5.32 × 4 =
6. 6.Double 87 =
7. 7.Double 24 =
8. 8.123456 × 9 + 7 =
9. 9.I thought of a number, multiplied it by 2 and added 6. I got 22. What was my number?
10. 10.44 × 4 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
12. 12.396 + 693 =
13. 13.You have 11 coins. Each coin is ₹1 or ₹2, and together they make ₹15. How many ₹2 coins do you have?
14. 14.If today is Sunday, what day will it be after 73 days? (a) Tuesday (b) Thursday (c) Saturday (d) Wednesday
15. 15.49 × 4 =
16. 16.Half of 142 =
17. 17.9 × 8 =
18. 18.1234567 × 9 + 8 =
19. 19.If today is Saturday, what day was it 10 days ago? (a) Thursday (b) Saturday (c) Wednesday (d) Tuesday
20. 20.1234567 × 8 + 7 =
21. 21.Magic square (every row, column and diagonal has the same total): 16 18 8 | 6 14 22 | ? 10 12. What is the missing number?
22. 22.Magic square (every row, column and diagonal has the same total): 14 35 20 | 29 23 ? | 26 11 32. What is the missing number?
23. 23.9 × 1 =
24. 24.What comes next? 12, 17, 22, 27, ? (a) 33 (b) 27 (c) 32 (d) 37
25. 25.11 × 4 =
26. 26.What comes next? 5, 10, 20, 40, ? (a) 80 (b) 81 (c) 70 (d) 60
27. 27.I thought of a number, added 1 and then doubled it. I got 34. What was my number?
28. 28.393 × 10 =
29. 29.Magic square (every row, column and diagonal has the same total): ? 11 6 | 9 7 5 | 8 3 10. What is the missing number?
30. 30.35 × 4 =
31. 31.37 × 100 =
32. 32.58 × 4 =
33. 33.1 + 2 + 3 + … + 45 =
34. 34.9 × 5 = 4? — what is the missing digit?
35. 35.Magic square (every row, column and diagonal has the same total): 8 29 14 | 23 17 ? | 20 5 26. What is the missing number?
36. 36.Magic square (every row, column and diagonal has the same total): 9 7 17 | 19 ? 3 | 5 15 13. What is the missing number?
37. 37.What comes next? 3, 6, 12, 24, ? (a) 36 (b) 48 (c) 42 (d) 49
38. 38.Odd one out: which number is NOT in the 3 times table? (a) 11 (b) 12 (c) 21 (d) 9
39. 39.Double 89 =
40. 40.Magic square (every row, column and diagonal has the same total): 13 34 19 | ? 22 16 | 25 10 31. What is the missing number?

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