Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 750 · 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. 1.860 × 10 =
2. 2.What comes next? 2, 7, 12, 17, ? (a) 27 (b) 23 (c) 22 (d) 17
3. 3.?116 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
4. 4.I thought of a number, added 5 and then doubled it. I got 42. What was my number?
5. 5.If today is Saturday, what day will it be after 71 days? (a) Saturday (b) Wednesday (c) Monday (d) Sunday
6. 6.37 × 4 =
7. 7.2?15 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
8. 8.Magic square (every row, column and diagonal has the same total): ? 18 11 | 12 14 16 | 17 10 15. What is the missing number?
9. 9.I thought of a number, multiplied it by 2 and added 8. I got 22. What was my number?
10. 10.Magic square (every row, column and diagonal has the same total): 18 33 12 | 15 21 ? | 30 9 24. What is the missing number?
11. 11.Magic trick! Think of 20. Double it, add 18, halve it, then take away 20. What number do you get?
12. 12.5 × 9 =
13. 13.I thought of a number, multiplied it by 4 and added 1. I got 57. What was my number?
14. 14.The ages of two twins add up to 10. How old is each twin?
15. 15.If today is Sunday, what day was it 36 days ago? (a) Saturday (b) Tuesday (c) Friday (d) Sunday
16. 16.Magic square (every row, column and diagonal has the same total): 12 ? 20 | 26 18 10 | 16 14 24. What is the missing number?
17. 17.If today is Thursday, what day was it 45 days ago? (a) Sunday (b) Thursday (c) Tuesday (d) Monday
18. 18.Half of 154 =
19. 19.2 × 9 =
20. 20.If today is Thursday, what day will it be after 79 days? (a) Friday (b) Tuesday (c) Saturday (d) Sunday
21. 21.12 × 4 =
22. 22.I thought of a number, added 9 and then doubled it. I got 50. What was my number?
23. 23.7?59 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
24. 24.A girl is 11 years old and her brother is 2 years older. How old will her brother be in 8 years?
25. 25.A piggy bank has 9 coins of ₹5 and 14 coins of ₹2. How many rupees are in it?
26. 26.I thought of a number, added 7 and then doubled it. I got 46. What was my number?
27. 27.A piggy bank has 9 coins of ₹5 and 15 coins of ₹2. How many rupees are in it?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
29. 29.A girl is 9 years old and her brother is 2 years older. How old will her brother be in 5 years?
30. 30.You have 8 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
31. 31.?710 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
32. 32.If today is Friday, what day was it 36 days ago? (a) Sunday (b) Friday (c) Wednesday (d) Thursday
33. 33.The ages of two twins add up to 22. How old is each twin?
34. 34.Magic square (every row, column and diagonal has the same total): 6 ? 8 | 7 5 3 | 2 9 4. What is the missing number?
35. 35.The ages of two twins add up to 8. How old is each twin?
36. 36.84 × 100 =
37. 37.57 × 4 =
38. 38.59 × 4 =
39. 39.297 + 792 =
40. 40.In 3 years a boy will be 12 years old. How old was he 7 years ago?

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