Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 831 · 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. 1.15 × 100 =
2. 2.35 × 100 =
3. 3.9 × 10 =
4. 4.5 × 9 =
5. 5.12345679 × 45 =
6. 6.A piggy bank has 9 coins of ₹5 and 11 coins of ₹2. How many rupees are in it?
7. 7.What comes next? 1, 2, 4, 8, ? (a) 16 (b) 12 (c) 14 (d) 17
8. 8.The 2nd of a month is a Monday. What day is the 14th of the same month? (a) Tuesday (b) Friday (c) Saturday (d) Sunday
9. 9.9 × 2 =
10. 10.Double 98 =
11. 11.12345678 × 9 + 9 =
12. 12.Double 74 =
13. 13.Odd one out: which number is NOT in the 8 times table? (a) 40 (b) 64 (c) 71 (d) 32
14. 14.A father is 36 years old and his son is 12. How old was the father when the son was born?
15. 15.A father is 43 years old and his son is 4. How old was the father when the son was born?
16. 16.Magic square (every row, column and diagonal has the same total): 6 5 10 | 11 ? 3 | 4 9 8. What is the missing number?
17. 17.37 × 27 =
18. 18.9 × 9 = 8? — what is the missing digit?
19. 19.In 5 years a boy will be 13 years old. How old was he 7 years ago?
20. 20.What comes next? 3, 6, 9, 12, ? (a) 18 (b) 15 (c) 12 (d) 16
21. 21.Magic square (every row, column and diagonal has the same total): 10 11 6 | 5 ? 13 | 12 7 8. What is the missing number?
22. 22.Magic trick! Think of 16. Double it, add 18, halve it, then take away 16. What number do you get?
23. 23.255 × ? = 2550
24. 24.What comes next? 36, 49, 64, 81, ? (a) 101 (b) 98 (c) 100 (d) 102
25. 25.Magic square (every row, column and diagonal has the same total): 4 18 8 | 14 10 6 | 12 2 ?. What is the missing number?
26. 26.1 + 2 + 3 + … + 74 =
27. 27.Think of 6. Multiply it by 4, then add 4. What number do you end with?
28. 28.Double 46 =
29. 29.What comes next? 13, 18, 23, 28, ? (a) 38 (b) 34 (c) 33 (d) 28
30. 30.81 × 100 =
31. 31.3 × 9 =
32. 32.Take 98 and take away the sum of its digits. What do you get?
33. 33.702? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
34. 34.12345679 × 63 =
35. 35.I thought of a number, multiplied it by 3 and added 1. I got 43. What was my number?
36. 36.I thought of a number, added 2 and then doubled it. I got 32. What was my number?
37. 37.9 × 5 = ?5 — what is the missing digit?
38. 38.Odd one out: which number is NOT in the 6 times table? (a) 24 (b) 12 (c) 14 (d) 36
39. 39.Half of 64 =
40. 40.What comes next? 2, 4, 8, 16, ? (a) 24 (b) 28 (c) 32 (d) 33

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