Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 38 · 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. 1.50? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
2. 2.Magic square (every row, column and diagonal has the same total): 16 18 8 | 6 14 ? | 20 10 12. What is the missing number?
3. 3.Half of 32 =
4. 4.Half of 148 =
5. 5.Magic trick! Think of 17. Double it, add 14, halve it, then take away 17. What number do you get?
6. 6.9 × 9 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
8. 8.A piggy bank has 3 coins of ₹5 and 11 coins of ₹2. How many rupees are in it?
9. 9.Take 277. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.3?87 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
11. 11.37 × 18 =
12. 12.Magic square (every row, column and diagonal has the same total): 4 3 8 | 9 5 ? | 2 7 6. What is the missing number?
13. 13.33 × 4 =
14. 14.Magic square (every row, column and diagonal has the same total): 15 36 21 | ? 24 18 | 27 12 33. What is the missing number?
15. 15.76?3 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
16. 16.Magic square (every row, column and diagonal has the same total): 20 23 8 | 5 17 29 | 26 11 ?. What is the missing number?
17. 17.9 × 6 =
18. 18.416 × ? = 4160
19. 19.2 × 9 =
20. 20.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.9 × 6 = ?4 — what is the missing digit?
22. 22.12345679 × 45 =
23. 23.9 × 2 =
24. 24.If today is Friday, what day will it be after 54 days? (a) Wednesday (b) Thursday (c) Saturday (d) Tuesday
25. 25.396 + 693 =
26. 26.6 × 9 =
27. 27.What comes next? 3, 6, 12, 24, ? (a) 42 (b) 48 (c) 36 (d) 49
28. 28.37 × 27 =
29. 29.54 × 4 =
30. 30.Double 53 =
31. 31.1 + 2 + 3 + … + 65 =
32. 32.877? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
33. 33.1 + 2 + 3 + … + 100 =
34. 34.11 × 4 =
35. 35.495 + 594 =
36. 36.The ages of two twins add up to 8. How old is each twin?
37. 37.4 × 9 =
38. 38.14 × ? = 1400
39. 39.7 × 9 =
40. 40.1 + 3 + 5 + … + 17 =

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