Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 135 · 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. 1.11 × 11 =
2. 2.If today is Tuesday, what day was it 26 days ago? (a) Friday (b) Sunday (c) Thursday (d) Wednesday
3. 3.25 × 4 =
4. 4.Magic square (every row, column and diagonal has the same total): 13 23 ? | 27 19 11 | 17 15 25. What is the missing number?
5. 5.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹8. How many ₹2 coins do you have?
6. 6.Magic trick! Think of 10. Double it, add 6, halve it, then take away 10. What number do you get?
7. 7.What comes next? 16, 25, 34, 43, ? (a) 53 (b) 43 (c) 61 (d) 52
8. 8.Think of 15. Multiply it by 2, then add 8. What number do you end with?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
10. 10.20 × 4 =
11. 11.38 × 4 =
12. 12.I thought of a number, multiplied it by 2 and added 4. I got 14. What was my number?
13. 13.The 4th of a month is a Sunday. What day is the 25th of the same month? (a) Wednesday (b) Sunday (c) Monday (d) Saturday
14. 14.What comes next? 13, 15, 17, 19, ? (a) 22 (b) 23 (c) 19 (d) 21
15. 15.9 × 9 =
16. 16.Half of 112 =
17. 17.54?5 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
18. 18.9 × 5 =
19. 19.8 × 9 =
20. 20.9 × 6 = ?4 — what is the missing digit?
21. 21.I thought of a number, added 1 and then doubled it. I got 38. What was my number?
22. 22.What comes next? 6, 8, 10, 12, ? (a) 14 (b) 12 (c) 15 (d) 16
23. 23.Magic trick! Think of 7. Double it, add 8, halve it, then take away 7. What number do you get?
24. 24.9 × 2 =
25. 25.9 × 6 = 5? — what is the missing digit?
26. 26.The ages of two twins add up to 24. How old is each twin?
27. 27.1 + 2 + 3 + … + 64 =
28. 28.Think of 8. Multiply it by 5, then add 3. What number do you end with?
29. 29.?674 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
30. 30.9 × 2 = 1? — what is the missing digit?
31. 31.20 × ? = 2000
32. 32.A girl is 5 years old and her brother is 4 years older. How old will her brother be in 6 years?
33. 33.440? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
34. 34.Magic trick! Think of 18. Double it, add 10, halve it, then take away 18. What number do you get?
35. 35.2 × 9 =
36. 36.1 + 2 + 3 + … + 61 =
37. 37.6 × 9 =
38. 38.Magic square (every row, column and diagonal has the same total): 29 8 23 | 14 20 26 | 17 32 ?. What is the missing number?
39. 39.9 × 10 =
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?

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