Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 410 · 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 + 3 + 5 + … + 11 =
2. 2.Magic square (every row, column and diagonal has the same total): ? 17 12 | 15 13 11 | 14 9 16. What is the missing number?
3. 3.I thought of a number, multiplied it by 2 and added 5. I got 11. What was my number?
4. 4.If today is Monday, what day was it 16 days ago? (a) Saturday (b) Friday (c) Sunday (d) Tuesday
5. 5.37 × 1000 =
6. 6.1 + 3 + 5 + … + 47 =
7. 7.Magic square (every row, column and diagonal has the same total): 17 27 13 | ? 19 23 | 25 11 21. What is the missing number?
8. 8.5 × 9 =
9. 9.12345679 × 72 =
10. 10.985 × 10 =
11. 11.Magic square (every row, column and diagonal has the same total): 21 6 27 | 24 18 ? | 9 30 15. What is the missing number?
12. 12.If today is Saturday, what day will it be after 77 days? (a) Saturday (b) Tuesday (c) Friday (d) Sunday
13. 13.The 6th of a month is a Friday. What day is the 17th of the same month? (a) Friday (b) Monday (c) Tuesday (d) Wednesday
14. 14.1 + 2 + 3 + … + 76 =
15. 15.15 × 1000 =
16. 16.Magic square (every row, column and diagonal has the same total): 8 13 12 | 15 11 7 | ? 9 14. What is the missing number?
17. 17.Magic square (every row, column and diagonal has the same total): 10 3 8 | 5 7 9 | 6 ? 4. What is the missing number?
18. 18.1 + 3 + 5 + … + 43 =
19. 19.43 × 4 =
20. 20.9 × 1 =
21. 21.55 × 4 =
22. 22.42 × 1000 =
23. 23.9 × 2 =
24. 24.Odd one out: which number is NOT in the 8 times table? (a) 54 (b) 56 (c) 32 (d) 64
25. 25.Magic square (every row, column and diagonal has the same total): 17 ? 13 | 15 19 23 | 25 11 21. What is the missing number?
26. 26.9 × 6 = ?4 — what is the missing digit?
27. 27.9 × 6 = 5? — what is the missing digit?
28. 28.Double 51 =
29. 29.9 × 5 = ?5 — what is the missing digit?
30. 30.9 × 5 = 4? — what is the missing digit?
31. 31.I thought of a number, multiplied it by 4 and added 3. I got 35. What was my number?
32. 32.42 × 100 =
33. 33.9 × 4 = ?6 — what is the missing digit?
34. 34.Take 51 and take away the sum of its digits. What do you get?
35. 35.1 + 2 + 3 + … + 15 =
36. 36.Double 46 =
37. 37.2 × 9 =
38. 38.You have 8 coins. Each coin is ₹1 or ₹2, and together they make ₹13. How many ₹2 coins do you have?
39. 39.Magic square (every row, column and diagonal has the same total): 7 12 ? | 6 8 10 | 11 4 9. What is the missing number?
40. 40.9 × 7 =

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