Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 269 · 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. 1.74?0 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
2. 2.Half of 196 =
3. 3.Do the 1089 trick with 866: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.9 × 8 =
5. 5.A father is 35 years old and his son is 8. How old was the father when the son was born?
6. 6.Half of 156 =
7. 7.1 + 2 + 3 + … + 80 =
8. 8.9 × 4 =
9. 9.Magic square (every row, column and diagonal has the same total): 24 ? 30 | 27 21 15 | 12 33 18. What is the missing number?
10. 10.2 × 1000 =
11. 11.Double 73 =
12. 12.If today is Sunday, what day will it be after 16 days? (a) Monday (b) Tuesday (c) Wednesday (d) Friday
13. 13.If today is Sunday, what day was it 34 days ago? (a) Thursday (b) Tuesday (c) Sunday (d) Monday
14. 14.9 × 10 = ?0 — what is the missing digit?
15. 15.1 + 3 + 5 + … + 13 =
16. 16.What comes next? 4, 9, 16, 25, ? (a) 37 (b) 34 (c) 38 (d) 36
17. 17.Magic square (every row, column and diagonal has the same total): 19 4 25 | 22 16 10 | 7 ? 13. What is the missing number?
18. 18.198 + 891 =
19. 19.Magic square (every row, column and diagonal has the same total): 8 ? 12 | 13 9 5 | 6 11 10. What is the missing number?
20. 20.9 × 2 = 1? — what is the missing digit?
21. 21.Double 48 =
22. 22.Take 25 and take away the sum of its digits. What do you get?
23. 23.I thought of a number, added 2 and then doubled it. I got 14. What was my number?
24. 24.Take 618. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.37 × 15 =
26. 26.123 × 9 + 4 =
27. 27.37 × 9 =
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
29. 29.9 × 3 = 2? — what is the missing digit?
30. 30.792 + 297 =
31. 31.17 × 4 =
32. 32.Double 71 =
33. 33.9 × 5 = ?5 — what is the missing digit?
34. 34.Double 86 =
35. 35.A piggy bank has 3 coins of ₹5 and 9 coins of ₹2. How many rupees are in it?
36. 36.Magic square (every row, column and diagonal has the same total): 14 35 20 | 29 23 17 | 26 ? 32. What is the missing number?
37. 37.9 × 6 = 5? — what is the missing digit?
38. 38.578 × ? = 5780
39. 39.What comes next? 18, 23, 28, 33, ? (a) 39 (b) 43 (c) 33 (d) 38
40. 40.Take 24 and take away the sum of its digits. What do you get?

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