Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 87 · 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.You have 15 coins. Each coin is ₹1 or ₹2, and together they make ₹18. How many ₹2 coins do you have?
2. 2.75?9 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
3. 3.Do the 1089 trick with 599: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Double 57 =
5. 5.What comes next? 4, 9, 16, 25, ? (a) 34 (b) 36 (c) 38 (d) 37
6. 6.88?5 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
7. 7.1 + 3 + 5 + … + 11 =
8. 8.9 × 2 =
9. 9.33 × ? = 33000
10. 10.1 + 2 + 3 + … + 81 =
11. 11.693 + 396 =
12. 12.?281 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
13. 13.1 + 2 + 3 + … + 100 =
14. 14.12 × 4 =
15. 15.37 × 3 =
16. 16.Double 71 =
17. 17.If today is Tuesday, what day will it be after 97 days? (a) Monday (b) Sunday (c) Thursday (d) Tuesday
18. 18.A father is 34 years old and his son is 7. How old was the father when the son was born?
19. 19.?212 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
20. 20.95 × 100 =
21. 21.9 × 3 =
22. 22.Take 518. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.You have 9 coins. Each coin is ₹1 or ₹2, and together they make ₹14. How many ₹2 coins do you have?
24. 24.9 × 4 =
25. 25.20 × 4 =
26. 26.If today is Thursday, what day will it be after 45 days? (a) Sunday (b) Saturday (c) Monday (d) Wednesday
27. 27.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.?998 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
29. 29.37 × 15 =
30. 30.Magic square (every row, column and diagonal has the same total): 9 4 11 | 10 8 ? | 5 12 7. What is the missing number?
31. 31.1 + 3 + 5 + … + 15 =
32. 32.12345679 × 81 =
33. 33.19 × 4 =
34. 34.9 × 9 =
35. 35.73 × 10 =
36. 36.What comes next? 25, 36, 49, 64, ? (a) 79 (b) 81 (c) 82 (d) 83
37. 37.You have 5 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
38. 38.1 + 3 + 5 + … + 43 =
39. 39.9 × 7 = ?3 — what is the missing digit?
40. 40.The 3rd of a month is a Friday. What day is the 29th of the same month? (a) Tuesday (b) Thursday (c) Saturday (d) Wednesday

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