Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 548 · 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. 1.39 × ? = 39000
2. 2.9 × 4 = ?6 — what is the missing digit?
3. 3.Take 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.5 × 9 =
5. 5.What comes next? 5, 10, 15, 20, ? (a) 26 (b) 30 (c) 20 (d) 25
6. 6.If today is Sunday, what day will it be after 25 days? (a) Wednesday (b) Sunday (c) Friday (d) Thursday
7. 7.37 × 21 =
8. 8.Magic trick! Think of 6. Double it, add 18, halve it, then take away 6. What number do you get?
9. 9.2 × 9 =
10. 10.9 × 4 =
11. 11.Half of 92 =
12. 12.1 + 3 + 5 + … + 9 =
13. 13.Magic square (every row, column and diagonal has the same total): 6 1 8 | 7 5 ? | 2 9 4. What is the missing number?
14. 14.57 × 4 =
15. 15.Take 34 and take away the sum of its digits. What do you get?
16. 16.37 × 6 =
17. 17.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.111 × 111 =
20. 20.Half of 108 =
21. 21.Double 55 =
22. 22.Half of 94 =
23. 23.10 × 9 =
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
25. 25.11111 × 11111 =
26. 26.What comes next? 2, 4, 8, 16, ? (a) 28 (b) 33 (c) 24 (d) 32
27. 27.86?8 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
28. 28.A piggy bank has 12 coins of ₹5 and 15 coins of ₹2. How many rupees are in it?
29. 29.?260 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
30. 30.1 + 3 + 5 + … + 43 =
31. 31.9 × 6 = ?4 — what is the missing digit?
32. 32.57 × ? = 5700
33. 33.Half of 182 =
34. 34.You have 13 coins. Each coin is ₹1 or ₹2, and together they make ₹14. How many ₹2 coins do you have?
35. 35.I thought of a number, added 1 and then doubled it. I got 36. What was my number?
36. 36.3 × 9 =
37. 37.Odd one out: which number is NOT in the 5 times table? (a) 46 (b) 15 (c) 20 (d) 10
38. 38.What comes next? 1, 2, 4, 8, ? (a) 14 (b) 17 (c) 16 (d) 12
39. 39.1 + 2 + 3 + … + 47 =
40. 40.If today is Friday, what day will it be after 38 days? (a) Monday (b) Thursday (c) Sunday (d) Tuesday

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