Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 867 · 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. 1.16 × 1000 =
2. 2.Odd one out: which number is NOT in the 8 times table? (a) 64 (b) 16 (c) 40 (d) 74
3. 3.2?10 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
4. 4.Magic square (every row, column and diagonal has the same total): 9 14 7 | 8 ? 12 | 13 6 11. What is the missing number?
5. 5.Magic square (every row, column and diagonal has the same total): 2 9 ? | 7 5 3 | 6 1 8. What is the missing number?
6. 6.27 × 4 =
7. 7.A father is 37 years old and his son is 8. How old was the father when the son was born?
8. 8.A father is 30 years old and his son is 9. How old was the father when the son was born?
9. 9.Magic square (every row, column and diagonal has the same total): 7 12 11 | 14 10 ? | 9 8 13. What is the missing number?
10. 10.32?6 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
11. 11.2 × 9 =
12. 12.A piggy bank has 7 coins of ₹5 and 11 coins of ₹2. How many rupees are in it?
13. 13.Magic trick! Think of 5. Double it, add 8, halve it, then take away 5. What number do you get?
14. 14.The ages of two twins add up to 28. How old is each twin?
15. 15.34 × 4 =
16. 16.9 × 8 = ?2 — what is the missing digit?
17. 17.11111 × 11111 =
18. 18.55 × 4 =
19. 19.Magic square (every row, column and diagonal has the same total): 10 15 ? | 17 13 9 | 12 11 16. What is the missing number?
20. 20.I thought of a number, added 4 and then doubled it. I got 34. What was my number?
21. 21.Magic square (every row, column and diagonal has the same total): 12 ? 24 | 33 21 9 | 18 15 30. What is the missing number?
22. 22.Do the 1089 trick with 280: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.10 × 4 =
24. 24.Magic square (every row, column and diagonal has the same total): 25 11 21 | ? 19 23 | 17 27 13. What is the missing number?
25. 25.28 × 4 =
26. 26.1 + 2 + 3 + … + 68 =
27. 27.90 × 100 =
28. 28.Double 63 =
29. 29.3 × 9 =
30. 30.723 × 10 =
31. 31.Half of 172 =
32. 32.5 × 9 =
33. 33.692 × 10 =
34. 34.75 × ? = 7500
35. 35.9 × 3 =
36. 36.A girl is 9 years old and her brother is 6 years older. How old will her brother be in 5 years?
37. 37.9 × 1 =
38. 38.Double 84 =
39. 39.12345678 × 8 + 8 =
40. 40.41 × 100 =

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