Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 865 · 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.The ages of two twins add up to 12. How old is each twin?
2. 2.18 × 1000 =
3. 3.1 + 3 + 5 + … + 19 =
4. 4.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.9 × 8 = 7? — what is the missing digit?
6. 6.What comes next? 18, 26, 34, 42, ? (a) 42 (b) 50 (c) 58 (d) 51
7. 7.What comes next? 20, 27, 34, 41, ? (a) 55 (b) 49 (c) 41 (d) 48
8. 8.496? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
9. 9.123456 × 8 + 6 =
10. 10.Double 93 =
11. 11.Magic square (every row, column and diagonal has the same total): 8 ? 16 | 18 10 2 | 4 14 12. What is the missing number?
12. 12.9 × 1 =
13. 13.What comes next? 1, 2, 4, 8, ? (a) 14 (b) 12 (c) 16 (d) 17
14. 14.9 × 9 =
15. 15.Magic square (every row, column and diagonal has the same total): 5 12 7 | 10 ? 6 | 9 4 11. What is the missing number?
16. 16.Think of 12. Multiply it by 4, then add 2. What number do you end with?
17. 17.Half of 148 =
18. 18.1 + 3 + 5 + … + 23 =
19. 19.12 × 1000 =
20. 20.7 × 1000 =
21. 21.If today is Monday, what day will it be after 95 days? (a) Saturday (b) Thursday (c) Friday (d) Monday
22. 22.Magic trick! Think of 18. Double it, add 8, halve it, then take away 18. What number do you get?
23. 23.57 × 4 =
24. 24.9 × 10 = ?0 — what is the missing digit?
25. 25.1 + 3 + 5 + … + 33 =
26. 26.A piggy bank has 6 coins of ₹5 and 15 coins of ₹2. How many rupees are in it?
27. 27.37 × 9 =
28. 28.2 × 9 =
29. 29.Magic square (every row, column and diagonal has the same total): 13 3 17 | 15 11 7 | 5 19 ?. What is the missing number?
30. 30.8?26 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
31. 31.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.9 × 4 = ?6 — what is the missing digit?
33. 33.If today is Sunday, what day was it 22 days ago? (a) Saturday (b) Friday (c) Tuesday (d) Sunday
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
35. 35.48 × ? = 48000
36. 36.Think of 4. Multiply it by 2, then add 9. What number do you end with?
37. 37.Half of 164 =
38. 38.Half of 146 =
39. 39.Magic square (every row, column and diagonal has the same total): 12 14 4 | 2 10 18 | 16 ? 8. What is the missing number?
40. 40.4 × 1000 =

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