Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 55 · 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 × 3 = ?7 — what is the missing digit?
2. 2.166 × 10 =
3. 3.Double 44 =
4. 4.88 × 100 =
5. 5.198 + 891 =
6. 6.9 × 4 = ?6 — what is the missing digit?
7. 7.Magic square (every row, column and diagonal has the same total): 13 11 21 | 23 15 7 | 9 19 ?. What is the missing number?
8. 8.Take 79 and take away the sum of its digits. What do you get?
9. 9.?637 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
10. 10.9 × 2 = 1? — what is the missing digit?
11. 11.1 + 2 + 3 + … + 86 =
12. 12.111 × 111 =
13. 13.Magic square (every row, column and diagonal has the same total): 7 22 19 | 28 16 4 | 13 10 ?. What is the missing number?
14. 14.Magic square (every row, column and diagonal has the same total): 3 ? 7 | 10 6 2 | 5 4 9. What is the missing number?
15. 15.Think of 5. Multiply it by 2, then add 9. What number do you end with?
16. 16.Think of 8. Multiply it by 2, then add 4. What number do you end with?
17. 17.Magic trick! Think of 3. Double it, add 4, halve it, then take away 3. What number do you get?
18. 18.51 × 4 =
19. 19.?98 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
20. 20.60 × 4 =
21. 21.9 × 9 =
22. 22.9 × 9 = 8? — what is the missing digit?
23. 23.Magic square (every row, column and diagonal has the same total): 4 9 8 | 11 7 3 | 6 5 ?. What is the missing number?
24. 24.Take 249. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.What comes next? 1, 4, 9, 16, ? (a) 27 (b) 25 (c) 23 (d) 26
26. 26.1 + 2 + 3 + … + 6 =
27. 27.Take 23 and take away the sum of its digits. What do you get?
28. 28.The 4th of a month is a Sunday. What day is the 17th of the same month? (a) Tuesday (b) Friday (c) Saturday (d) Sunday
29. 29.A piggy bank has 11 coins of ₹5 and 5 coins of ₹2. How many rupees are in it?
30. 30.Odd one out: which number is NOT in the 7 times table? (a) 35 (b) 62 (c) 14 (d) 28
31. 31.30 × 4 =
32. 32.A piggy bank has 9 coins of ₹5 and 5 coins of ₹2. How many rupees are in it?
33. 33.A girl is 6 years old and her brother is 5 years older. How old will her brother be in 6 years?
34. 34.A father is 31 years old and his son is 4. How old was the father when the son was born?
35. 35.Magic square (every row, column and diagonal has the same total): 27 30 15 | 12 24 ? | 33 18 21. What is the missing number?
36. 36.9 × 5 = 4? — what is the missing digit?
37. 37.Magic square (every row, column and diagonal has the same total): 12 22 20 | 26 18 10 | 16 14 ?. What is the missing number?
38. 38.45 × 1000 =
39. 39.9 × 10 = ?0 — what is the missing digit?
40. 40.?309 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?

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