Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 437 · 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. 1.1 + 2 + 3 + … + 53 =
2. 2.5 × 9 =
3. 3.21 × 4 =
4. 4.44 × 4 =
5. 5.Magic square (every row, column and diagonal has the same total): 25 11 21 | 15 19 23 | 17 ? 13. What is the missing number?
6. 6.2 × 9 =
7. 7.If today is Tuesday, what day was it 58 days ago? (a) Wednesday (b) Sunday (c) Saturday (d) Monday
8. 8.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.1111 × 1111 =
10. 10.A piggy bank has 2 coins of ₹5 and 15 coins of ₹2. How many rupees are in it?
11. 11.The 4th of a month is a Saturday. What day is the 15th of the same month? (a) Saturday (b) Tuesday (c) Thursday (d) Wednesday
12. 12.Magic square (every row, column and diagonal has the same total): 8 1 6 | 3 5 7 | ? 9 2. What is the missing number?
13. 13.34 × 4 =
14. 14.936 × 10 =
15. 15.28 × 1000 =
16. 16.495 + 594 =
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.1 + 2 + 3 + … + 92 =
19. 19.A piggy bank has 2 coins of ₹5 and 7 coins of ₹2. How many rupees are in it?
20. 20.Magic square (every row, column and diagonal has the same total): 32 ? 26 | 17 23 29 | 20 35 14. What is the missing number?
21. 21.1 + 2 + 3 + … + 68 =
22. 22.A father is 31 years old and his son is 10. How old was the father when the son was born?
23. 23.53 × 4 =
24. 24.Magic square (every row, column and diagonal has the same total): 19 22 7 | 4 16 ? | 25 10 13. What is the missing number?
25. 25.What comes next? 3, 11, 19, 27, ? (a) 27 (b) 43 (c) 35 (d) 36
26. 26.Magic square (every row, column and diagonal has the same total): 9 16 11 | 14 12 ? | 13 8 15. What is the missing number?
27. 27.9 × 5 = ?5 — what is the missing digit?
28. 28.Magic square (every row, column and diagonal has the same total): 10 3 8 | 5 7 9 | 6 ? 4. What is the missing number?
29. 29.519 × 10 =
30. 30.418 × 10 =
31. 31.9 × 3 = 2? — what is the missing digit?
32. 32.If today is Sunday, what day was it 45 days ago? (a) Friday (b) Sunday (c) Thursday (d) Wednesday
33. 33.The ages of two twins add up to 30. How old is each twin?
34. 34.Take 46 and take away the sum of its digits. What do you get?
35. 35.What comes next? 3, 9, 15, 21, ? (a) 33 (b) 27 (c) 21 (d) 28
36. 36.You have 11 coins. Each coin is ₹1 or ₹2, and together they make ₹15. How many ₹2 coins do you have?
37. 37.52 × 100 =
38. 38.37 × 27 =
39. 39.9 × 9 = 8? — what is the missing digit?
40. 40.9 × 9 =

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