Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 564 · 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.If today is Monday, what day will it be after 60 days? (a) Saturday (b) Monday (c) Thursday (d) Friday
2. 2.9 × 8 = ?2 — what is the missing digit?
3. 3.1 + 2 + 3 + … + 8 =
4. 4.Think of 13. Multiply it by 4, then add 7. What number do you end with?
5. 5.28 × 4 =
6. 6.What comes next? 3, 6, 12, 24, ? (a) 48 (b) 36 (c) 49 (d) 42
7. 7.47 × 4 =
8. 8.The ages of two twins add up to 8. How old is each twin?
9. 9.Magic square (every row, column and diagonal has the same total): 7 28 13 | 22 16 10 | ? 4 25. What is the missing number?
10. 10.If today is Tuesday, what day will it be after 92 days? (a) Wednesday (b) Tuesday (c) Saturday (d) Thursday
11. 11.You have 8 coins. Each coin is ₹1 or ₹2, and together they make ₹13. How many ₹2 coins do you have?
12. 12.A piggy bank has 7 coins of ₹5 and 2 coins of ₹2. How many rupees are in it?
13. 13.1 + 3 + 5 + … + 43 =
14. 14.9 × 10 = ?0 — what is the missing digit?
15. 15.50 × 4 =
16. 16.9 × 8 =
17. 17.Half of 32 =
18. 18.1 + 3 + 5 + … + 37 =
19. 19.3 × 9 =
20. 20.49 × 1000 =
21. 21.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.297 + 792 =
23. 23.1 + 3 + 5 + … + 11 =
24. 24.The 5th of a month is a Saturday. What day is the 20th of the same month? (a) Monday (b) Wednesday (c) Sunday (d) Saturday
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
26. 26.375 × 10 =
27. 27.Double 61 =
28. 28.10 × 9 =
29. 29.1 + 2 + 3 + … + 82 =
30. 30.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.?943 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
32. 32.The 2nd of a month is a Monday. What day is the 13th of the same month? (a) Thursday (b) Friday (c) Monday (d) Saturday
33. 33.The 6th of a month is a Thursday. What day is the 27th of the same month? (a) Friday (b) Wednesday (c) Sunday (d) Thursday
34. 34.Magic square (every row, column and diagonal has the same total): 12 11 16 | 17 13 9 | 10 15 ?. What is the missing number?
35. 35.29 × 100 =
36. 36.In 3 years a boy will be 15 years old. How old was he 5 years ago?
37. 37.If today is Wednesday, what day will it be after 24 days? (a) Tuesday (b) Friday (c) Saturday (d) Sunday
38. 38.Half of 182 =
39. 39.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.9 × 6 = 5? — what is the missing digit?

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