Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 341 · 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.Double 34 =
2. 2.You have 9 coins. Each coin is ₹1 or ₹2, and together they make ₹14. How many ₹2 coins do you have?
3. 3.Magic square (every row, column and diagonal has the same total): 11 16 15 | 18 14 10 | 13 ? 17. What is the missing number?
4. 4.9 × 6 =
5. 5.12345679 × 9 =
6. 6.Magic square (every row, column and diagonal has the same total): 17 10 15 | ? 14 16 | 13 18 11. What is the missing number?
7. 7.9 × 6 = 5? — what is the missing digit?
8. 8.Half of 38 =
9. 9.Magic trick! Think of 10. Double it, add 18, halve it, then take away 10. What number do you get?
10. 10.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.176 × 10 =
12. 12.The 8th of a month is a Tuesday. What day is the 18th of the same month? (a) Monday (b) Thursday (c) Saturday (d) Friday
13. 13.9 × 7 = 6? — what is the missing digit?
14. 14.Half of 32 =
15. 15.23?3 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
16. 16.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.26 × 4 =
18. 18.9 × 3 = 2? — what is the missing digit?
19. 19.Magic square (every row, column and diagonal has the same total): 2 7 6 | 9 5 ? | 4 3 8. What is the missing number?
20. 20.1 + 2 + 3 + … + 74 =
21. 21.9 × 5 =
22. 22.Magic square (every row, column and diagonal has the same total): 26 11 32 | 29 23 17 | 14 35 ?. What is the missing number?
23. 23.9 × 2 = 1? — what is the missing digit?
24. 24.Magic square (every row, column and diagonal has the same total): 9 24 21 | 30 ? 6 | 15 12 27. What is the missing number?
25. 25.17 × 4 =
26. 26.I thought of a number, added 2 and then doubled it. I got 24. What was my number?
27. 27.Magic trick! Think of 13. Double it, add 8, halve it, then take away 13. What number do you get?
28. 28.9 × 3 = ?7 — what is the missing digit?
29. 29.Do the 1089 trick with 208: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.If today is Saturday, what day was it 33 days ago? (a) Tuesday (b) Monday (c) Sunday (d) Thursday
31. 31.12345679 × 18 =
32. 32.What comes next? 8, 10, 12, 14, ? (a) 18 (b) 16 (c) 14 (d) 17
33. 33.I thought of a number, added 5 and then doubled it. I got 50. What was my number?
34. 34.Double 91 =
35. 35.What comes next? 4, 7, 10, 13, ? (a) 19 (b) 13 (c) 17 (d) 16
36. 36.6 × 9 =
37. 37.Take 855. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Magic square (every row, column and diagonal has the same total): ? 8 23 | 14 20 26 | 17 32 11. What is the missing number?
39. 39.9 × 9 = 8? — what is the missing digit?
40. 40.33 × 4 =

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