Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 75 · 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.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.9 × 8 = 7? — what is the missing digit?
3. 3.1 + 2 + 3 + … + 93 =
4. 4.1 + 3 + 5 + … + 33 =
5. 5.37 × 6 =
6. 6.What comes next? 25, 36, 49, 64, ? (a) 81 (b) 79 (c) 82 (d) 83
7. 7.Magic square (every row, column and diagonal has the same total): 18 8 22 | 20 16 12 | 10 24 ?. What is the missing number?
8. 8.What comes next? 16, 25, 36, 49, ? (a) 62 (b) 65 (c) 64 (d) 66
9. 9.If today is Monday, what day will it be after 82 days? (a) Saturday (b) Sunday (c) Friday (d) Tuesday
10. 10.42 × 4 =
11. 11.3?18 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
12. 12.If today is Tuesday, what day will it be after 17 days? (a) Monday (b) Saturday (c) Friday (d) Thursday
13. 13.1 + 2 + 3 + … + 11 =
14. 14.What comes next? 5, 11, 17, 23, ? (a) 23 (b) 30 (c) 35 (d) 29
15. 15.What comes next? 4, 9, 16, 25, ? (a) 37 (b) 38 (c) 34 (d) 36
16. 16.Magic square (every row, column and diagonal has the same total): 11 21 19 | 25 17 9 | 15 13 ?. What is the missing number?
17. 17.11 × 4 =
18. 18.83?8 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
19. 19.6?54 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
21. 21.If today is Thursday, what day was it 19 days ago? (a) Tuesday (b) Sunday (c) Friday (d) Saturday
22. 22.?344 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
23. 23.A piggy bank has 9 coins of ₹5 and 6 coins of ₹2. How many rupees are in it?
24. 24.Magic square (every row, column and diagonal has the same total): 12 13 8 | 7 11 ? | 14 9 10. What is the missing number?
25. 25.9 × 4 = ?6 — what is the missing digit?
26. 26.111 × 10 =
27. 27.9 × 3 = ?7 — what is the missing digit?
28. 28.Magic square (every row, column and diagonal has the same total): ? 16 11 | 10 14 18 | 17 12 13. What is the missing number?
29. 29.9 × 1 =
30. 30.A piggy bank has 3 coins of ₹5 and 9 coins of ₹2. How many rupees are in it?
31. 31.If today is Saturday, what day will it be after 44 days? (a) Sunday (b) Thursday (c) Monday (d) Tuesday
32. 32.The 4th of a month is a Tuesday. What day is the 30th of the same month? (a) Saturday (b) Monday (c) Wednesday (d) Sunday
33. 33.Take 39 and take away the sum of its digits. What do you get?
34. 34.You have 5 coins. Each coin is ₹1 or ₹2, and together they make ₹6. How many ₹2 coins do you have?
35. 35.37 × 1000 =
36. 36.?785 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
37. 37.The 9th of a month is a Sunday. What day is the 29th of the same month? (a) Sunday (b) Tuesday (c) Saturday (d) Friday
38. 38.If today is Monday, what day was it 10 days ago? (a) Friday (b) Saturday (c) Thursday (d) Monday
39. 39.Half of 122 =
40. 40.Magic trick! Think of 8. Double it, add 10, halve it, then take away 8. What number do you get?

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