Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 695 · 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. 1.17 × 4 =
2. 2.The ages of two twins add up to 12. How old is each twin?
3. 3.594 + 495 =
4. 4.Take 61 and take away the sum of its digits. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
6. 6.Double 92 =
7. 7.1 + 3 + 5 + … + 21 =
8. 8.Magic square (every row, column and diagonal has the same total): 24 10 20 | 14 18 22 | ? 26 12. What is the missing number?
9. 9.9 × 9 =
10. 10.If today is Saturday, what day was it 14 days ago? (a) Saturday (b) Tuesday (c) Friday (d) Sunday
11. 11.1 + 2 + 3 + … + 29 =
12. 12.52 × 4 =
13. 13.Magic square (every row, column and diagonal has the same total): 14 35 20 | 29 23 ? | 26 11 32. What is the missing number?
14. 14.Odd one out: which number is NOT in the 7 times table? (a) 35 (b) 51 (c) 21 (d) 56
15. 15.Take 86 and take away the sum of its digits. What do you get?
16. 16.What comes next? 2, 4, 8, 16, ? (a) 32 (b) 24 (c) 28 (d) 33
17. 17.If today is Wednesday, what day was it 14 days ago? (a) Saturday (b) Wednesday (c) Tuesday (d) Thursday
18. 18.If today is Wednesday, what day was it 26 days ago? (a) Thursday (b) Monday (c) Saturday (d) Friday
19. 19.1111 × 1111 =
20. 20.I thought of a number, added 9 and then doubled it. I got 54. What was my number?
21. 21.?485 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
22. 22.If today is Monday, what day will it be after 10 days? (a) Wednesday (b) Sunday (c) Friday (d) Thursday
23. 23.Take 341. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.250 × 10 =
25. 25.9 × 10 = ?0 — what is the missing digit?
26. 26.9 × 7 =
27. 27.What comes next? 6, 9, 12, 15, ? (a) 21 (b) 18 (c) 15 (d) 19
28. 28.Take 70 and take away the sum of its digits. What do you get?
29. 29.I thought of a number, added 2 and then doubled it. I got 34. What was my number?
30. 30.2 × 9 =
31. 31.Take 34 and take away the sum of its digits. What do you get?
32. 32.Magic square (every row, column and diagonal has the same total): 11 ? 15 | 18 14 10 | 13 12 17. What is the missing number?
33. 33.1 × 9 =
34. 34.The ages of two twins add up to 24. How old is each twin?
35. 35.A piggy bank has 8 coins of ₹5 and 9 coins of ₹2. How many rupees are in it?
36. 36.Double 47 =
37. 37.9 × 9 = ?1 — what is the missing digit?
38. 38.The ages of two twins add up to 10. How old is each twin?
39. 39.What comes next? 3, 9, 15, 21, ? (a) 28 (b) 21 (c) 27 (d) 33
40. 40.59 × ? = 5900

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