Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 37 · 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.You have 10 coins. Each coin is ₹1 or ₹2, and together they make ₹11. How many ₹2 coins do you have?
2. 2.39 × 4 =
3. 3.Magic trick! Think of 6. Double it, add 4, halve it, then take away 6. What number do you get?
4. 4.674 × ? = 6740
5. 5.The 2nd of a month is a Monday. What day is the 24th of the same month? (a) Wednesday (b) Friday (c) Monday (d) Tuesday
6. 6.What comes next? 9, 16, 25, 36, ? (a) 49 (b) 50 (c) 47 (d) 51
7. 7.Half of 56 =
8. 8.A girl is 6 years old and her brother is 4 years older. How old will her brother be in 3 years?
9. 9.A piggy bank has 9 coins of ₹5 and 10 coins of ₹2. How many rupees are in it?
10. 10.If today is Monday, what day was it 54 days ago? (a) Saturday (b) Wednesday (c) Tuesday (d) Thursday
11. 11.9 × 8 = 7? — what is the missing digit?
12. 12.495 + 594 =
13. 13.9 × 8 =
14. 14.9 × 5 = ?5 — what is the missing digit?
15. 15.The 1st of a month is a Tuesday. What day is the 21st of the same month? (a) Tuesday (b) Sunday (c) Monday (d) Thursday
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.Take 75 and take away the sum of its digits. What do you get?
18. 18.1 + 2 + 3 + … + 36 =
19. 19.Double 98 =
20. 20.36 × 4 =
21. 21.Do the 1089 trick with 733: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.44 × 100 =
23. 23.123 × 8 + 3 =
24. 24.858 × ? = 8580
25. 25.31 × 4 =
26. 26.50 × 1000 =
27. 27.9 × 9 =
28. 28.Magic square (every row, column and diagonal has the same total): 20 5 26 | 23 17 11 | ? 29 14. What is the missing number?
29. 29.I thought of a number, multiplied it by 3 and added 2. I got 47. What was my number?
30. 30.7 × 4 =
31. 31.12345679 × 9 =
32. 32.23 × ? = 2300
33. 33.Magic square (every row, column and diagonal has the same total): 13 14 9 | 8 12 ? | 15 10 11. What is the missing number?
34. 34.The 4th of a month is a Monday. What day is the 17th of the same month? (a) Wednesday (b) Sunday (c) Saturday (d) Monday
35. 35.Half of 72 =
36. 36.In 2 years a boy will be 12 years old. How old was he 2 years ago?
37. 37.Double 31 =
38. 38.12 × 9 + 3 =
39. 39.A piggy bank has 3 coins of ₹5 and 6 coins of ₹2. How many rupees are in it?
40. 40.9 × 7 = 6? — what is the missing digit?

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