Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 528 · 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. 1.59 × 4 =
2. 2.Half of 22 =
3. 3.373 × ? = 3730
4. 4.1 + 2 + 3 + … + 75 =
5. 5.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.The 5th of a month is a Wednesday. What day is the 21st of the same month? (a) Thursday (b) Monday (c) Friday (d) Saturday
7. 7.33 × ? = 33000
8. 8.34 × 1000 =
9. 9.1 + 2 + 3 + … + 32 =
10. 10.70 × 100 =
11. 11.Double 63 =
12. 12.I thought of a number, added 2 and then doubled it. I got 16. What was my number?
13. 13.Odd one out: which number is NOT in the 3 times table? (a) 15 (b) 6 (c) 9 (d) 25
14. 14.What comes next? 9, 16, 25, 36, ? (a) 47 (b) 49 (c) 50 (d) 51
15. 15.96 × 100 =
16. 16.A father is 34 years old and his son is 7. How old was the father when the son was born?
17. 17.1 × 9 =
18. 18.What comes next? 1, 7, 13, 19, ? (a) 19 (b) 25 (c) 26 (d) 31
19. 19.9 × 7 =
20. 20.1 + 2 + 3 + … + 92 =
21. 21.270 × 10 =
22. 22.What comes next? 5, 8, 11, 14, ? (a) 20 (b) 17 (c) 18 (d) 14
23. 23.What comes next? 15, 24, 33, 42, ? (a) 52 (b) 42 (c) 60 (d) 51
24. 24.1 + 3 + 5 + … + 31 =
25. 25.6 × 4 =
26. 26.1 + 3 + 5 + … + 27 =
27. 27.40 × 4 =
28. 28.Magic square (every row, column and diagonal has the same total): 20 5 26 | 23 17 11 | 8 29 ?. What is the missing number?
29. 29.13 × 1000 =
30. 30.5 × 9 =
31. 31.The 8th of a month is a Saturday. What day is the 29th of the same month? (a) Sunday (b) Friday (c) Saturday (d) Tuesday
32. 32.795 × 10 =
33. 33.What comes next? 4, 9, 16, 25, ? (a) 36 (b) 38 (c) 34 (d) 37
34. 34.I thought of a number, multiplied it by 4 and added 2. I got 14. What was my number?
35. 35.Magic square (every row, column and diagonal has the same total): 6 27 12 | 21 15 ? | 18 3 24. What is the missing number?
36. 36.What comes next? 4, 8, 16, 32, ? (a) 56 (b) 65 (c) 64 (d) 48
37. 37.297 + 792 =
38. 38.A piggy bank has 12 coins of ₹5 and 4 coins of ₹2. How many rupees are in it?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?

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