Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 749 · 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.What comes next? 17, 19, 21, 23, ? (a) 26 (b) 23 (c) 25 (d) 27
2. 2.11 × 11 =
3. 3.?505 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
4. 4.8 × 9 =
5. 5.Magic square (every row, column and diagonal has the same total): 12 11 16 | 17 13 9 | ? 15 14. What is the missing number?
6. 6.A piggy bank has 2 coins of ₹5 and 14 coins of ₹2. How many rupees are in it?
7. 7.80 × 100 =
8. 8.10 × 9 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
10. 10.Magic trick! Think of 17. Double it, add 14, halve it, then take away 17. What number do you get?
11. 11.9 × 8 = ?2 — what is the missing digit?
12. 12.Take 31 and take away the sum of its digits. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.8 × ? = 8000
15. 15.Magic trick! Think of 8. Double it, add 14, halve it, then take away 8. What number do you get?
16. 16.A girl is 12 years old and her brother is 2 years older. How old will her brother be in 3 years?
17. 17.Magic square (every row, column and diagonal has the same total): 26 29 ? | 11 23 35 | 32 17 20. What is the missing number?
18. 18.9 × 7 =
19. 19.Double 31 =
20. 20.A piggy bank has 8 coins of ₹5 and 9 coins of ₹2. How many rupees are in it?
21. 21.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.I thought of a number, multiplied it by 2 and added 3. I got 15. What was my number?
24. 24.13 × ? = 13000
25. 25.Half of 136 =
26. 26.The ages of two twins add up to 30. How old is each twin?
27. 27.9 × 1 =
28. 28.What comes next? 2, 4, 6, 8, ? (a) 12 (b) 11 (c) 8 (d) 10
29. 29.4 × 9 =
30. 30.9 × 5 =
31. 31.Half of 62 =
32. 32.The 5th of a month is a Monday. What day is the 24th of the same month? (a) Saturday (b) Tuesday (c) Sunday (d) Friday
33. 33.Magic trick! Think of 11. Double it, add 18, halve it, then take away 11. What number do you get?
34. 34.7 × 9 =
35. 35.The 5th of a month is a Monday. What day is the 29th of the same month? (a) Thursday (b) Friday (c) Wednesday (d) Sunday
36. 36.Half of 146 =
37. 37.2?63 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
38. 38.1 + 2 + 3 + … + 50 =
39. 39.15 × ? = 1500
40. 40.Magic trick! Think of 14. Double it, add 12, halve it, then take away 14. What number do you get?

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