Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 65 · 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. 1.3 × 9 =
2. 2.The 2nd of a month is a Monday. What day is the 25th of the same month? (a) Thursday (b) Tuesday (c) Wednesday (d) Saturday
3. 3.5 × 1000 =
4. 4.?31 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
5. 5.In 4 years a boy will be 12 years old. How old was he 3 years ago?
6. 6.I thought of a number, added 7 and then doubled it. I got 52. What was my number?
7. 7.Half of 58 =
8. 8.Double 61 =
9. 9.Double 15 =
10. 10.I thought of a number, added 9 and then doubled it. I got 36. What was my number?
11. 11.693 + 396 =
12. 12.31 × 1000 =
13. 13.I thought of a number, added 9 and then doubled it. I got 52. What was my number?
14. 14.35 × ? = 3500
15. 15.What comes next? 2, 4, 8, 16, ? (a) 32 (b) 28 (c) 33 (d) 24
16. 16.Take 295. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.10 × 4 =
18. 18.If today is Thursday, what day was it 34 days ago? (a) Thursday (b) Friday (c) Saturday (d) Monday
19. 19.48 × 1000 =
20. 20.Take 94 and take away the sum of its digits. What do you get?
21. 21.9 × 7 =
22. 22.561 × ? = 5610
23. 23.123 × 8 + 3 =
24. 24.What comes next? 36, 49, 64, 81, ? (a) 100 (b) 102 (c) 98 (d) 101
25. 25.In 4 years a boy will be 13 years old. How old was he 4 years ago?
26. 26.12 × 4 =
27. 27.53 × 4 =
28. 28.9 × 9 = ?1 — what is the missing digit?
29. 29.What comes next? 9, 16, 25, 36, ? (a) 50 (b) 51 (c) 47 (d) 49
30. 30.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Odd one out: which number is NOT in the 4 times table? (a) 20 (b) 8 (c) 12 (d) 25
32. 32.Half of 12 =
33. 33.Double 95 =
34. 34.76?7 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
36. 36.59 × ? = 5900
37. 37.20 × 4 =
38. 38.Magic square (every row, column and diagonal has the same total): 12 5 10 | 7 9 11 | 8 13 ?. What is the missing number?
39. 39.12345679 × 63 =
40. 40.1 + 2 + 3 + … + 92 =

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