Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 557 · 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 25 and take away the sum of its digits. What do you get?
2. 2.Odd one out: which number is NOT in the 4 times table? (a) 20 (b) 12 (c) 28 (d) 14
3. 3.What comes next? 13, 17, 21, 25, ? (a) 33 (b) 29 (c) 30 (d) 25
4. 4.Magic trick! Think of 14. Double it, add 10, halve it, then take away 14. What number do you get?
5. 5.Think of 9. Multiply it by 3, then add 8. What number do you end with?
6. 6.43 × 4 =
7. 7.What comes next? 36, 49, 64, 81, ? (a) 98 (b) 102 (c) 101 (d) 100
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
9. 9.Magic square (every row, column and diagonal has the same total): 16 11 12 | 9 ? 17 | 14 15 10. What is the missing number?
10. 10.Magic square (every row, column and diagonal has the same total): 11 6 13 | 12 10 8 | ? 14 9. What is the missing number?
11. 11.9 × 10 = 9? — what is the missing digit?
12. 12.Magic square (every row, column and diagonal has the same total): 23 13 ? | 9 17 25 | 19 21 11. What is the missing number?
13. 13.9 × 9 = 8? — what is the missing digit?
14. 14.602? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
15. 15.9 × 6 =
16. 16.What comes next? 4, 12, 20, 28, ? (a) 37 (b) 44 (c) 28 (d) 36
17. 17.30 × 4 =
18. 18.What comes next? 4, 8, 16, 32, ? (a) 64 (b) 56 (c) 48 (d) 65
19. 19.9 × 4 = ?6 — what is the missing digit?
20. 20.Magic square (every row, column and diagonal has the same total): 11 21 7 | 9 13 ? | 19 5 15. What is the missing number?
21. 21.Take 692. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.12?2 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
23. 23.1 + 3 + 5 + … + 45 =
24. 24.The 9th of a month is a Monday. What day is the 21st of the same month? (a) Tuesday (b) Sunday (c) Friday (d) Saturday
25. 25.What comes next? 1, 4, 9, 16, ? (a) 27 (b) 26 (c) 23 (d) 25
26. 26.?136 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
27. 27.Do the 1089 trick with 245: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.If today is Friday, what day will it be after 56 days? (a) Saturday (b) Friday (c) Thursday (d) Monday
29. 29.Double 98 =
30. 30.You have 13 coins. Each coin is ₹1 or ₹2, and together they make ₹23. How many ₹2 coins do you have?
31. 31.9 × 4 = 3? — what is the missing digit?
32. 32.I thought of a number, multiplied it by 5 and added 8. I got 23. What was my number?
33. 33.The 4th of a month is a Saturday. What day is the 23rd of the same month? (a) Thursday (b) Sunday (c) Friday (d) Wednesday
34. 34.9 × 2 = ?8 — what is the missing digit?
35. 35.If today is Sunday, what day will it be after 84 days? (a) Saturday (b) Wednesday (c) Sunday (d) Monday
36. 36.What comes next? 2, 5, 8, 11, ? (a) 11 (b) 17 (c) 14 (d) 15
37. 37.A piggy bank has 9 coins of ₹5 and 9 coins of ₹2. How many rupees are in it?
38. 38.If today is Sunday, what day will it be after 37 days? (a) Wednesday (b) Monday (c) Tuesday (d) Friday
39. 39.A father is 42 years old and his son is 4. How old was the father when the son was born?
40. 40.9 × 9 =

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