Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 16 · 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.The 9th of a month is a Monday. What day is the 18th of the same month? (a) Thursday (b) Tuesday (c) Saturday (d) Wednesday
2. 2.A girl is 6 years old and her brother is 6 years older. How old will her brother be in 3 years?
3. 3.165 × 10 =
4. 4.What comes next? 7, 10, 13, 16, ? (a) 22 (b) 19 (c) 16 (d) 20
5. 5.9 × 3 = ?7 — what is the missing digit?
6. 6.12345679 × 45 =
7. 7.Double 32 =
8. 8.36 × 4 =
9. 9.Magic square (every row, column and diagonal has the same total): 13 15 5 | ? 11 19 | 17 7 9. What is the missing number?
10. 10.41 × 4 =
11. 11.9 × 9 = 8? — what is the missing digit?
12. 12.27 × 4 =
13. 13.36 × 100 =
14. 14.9 × 10 = 9? — what is the missing digit?
15. 15.9 × 9 = ?1 — what is the missing digit?
16. 16.39 × 4 =
17. 17.198 + 891 =
18. 18.Double 44 =
19. 19.30 × 4 =
20. 20.3 × 9 =
21. 21.22 × 4 =
22. 22.The 3rd of a month is a Wednesday. What day is the 19th of the same month? (a) Thursday (b) Friday (c) Saturday (d) Monday
23. 23.2?69 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 9 years old and her brother is 6 years older. How old will her brother be in 6 years?
25. 25.Magic square (every row, column and diagonal has the same total): 12 33 18 | 27 21 15 | 24 9 ?. What is the missing number?
26. 26.I thought of a number, multiplied it by 4 and added 6. I got 50. What was my number?
27. 27.Double 78 =
28. 28.If today is Wednesday, what day will it be after 10 days? (a) Tuesday (b) Saturday (c) Sunday (d) Friday
29. 29.2 × 9 =
30. 30.1 + 2 + 3 + … + 9 =
31. 31.Magic square (every row, column and diagonal has the same total): 7 12 11 | 14 10 6 | ? 8 13. What is the missing number?
32. 32.9 × 4 =
33. 33.You have 10 coins. Each coin is ₹1 or ₹2, and together they make ₹15. How many ₹2 coins do you have?
34. 34.The 2nd of a month is a Monday. What day is the 17th of the same month? (a) Tuesday (b) Monday (c) Friday (d) Wednesday
35. 35.Half of 196 =
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
37. 37.Magic square (every row, column and diagonal has the same total): 15 8 13 | 10 12 14 | ? 16 9. What is the missing number?
38. 38.Magic square (every row, column and diagonal has the same total): 7 8 3 | 2 6 10 | 9 ? 5. What is the missing number?
39. 39.I thought of a number, added 3 and then doubled it. I got 14. What was my number?
40. 40.518 × ? = 5180

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