Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 307 · 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. 1.1 + 2 + 3 + … + 67 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.Double 85 =
4. 4.If today is Saturday, what day will it be after 15 days? (a) Saturday (b) Wednesday (c) Sunday (d) Monday
5. 5.I thought of a number, multiplied it by 2 and added 9. I got 31. What was my number?
6. 6.198 + 891 =
7. 7.9 × 3 = ?7 — what is the missing digit?
8. 8.What comes next? 7, 13, 19, 25, ? (a) 31 (b) 37 (c) 25 (d) 32
9. 9.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.The ages of two twins add up to 30. How old is each twin?
11. 11.57 × 4 =
12. 12.9 × 8 =
13. 13.Think of 6. Multiply it by 5, then add 3. What number do you end with?
14. 14.8 × 4 =
15. 15.9 × 4 = 3? — what is the missing digit?
16. 16.594 + 495 =
17. 17.What comes next? 2, 7, 12, 17, ? (a) 17 (b) 22 (c) 27 (d) 23
18. 18.Half of 132 =
19. 19.1?16 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
20. 20.Double 33 =
21. 21.Odd one out: which number is NOT in the 8 times table? (a) 56 (b) 80 (c) 32 (d) 23
22. 22.You have 5 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
23. 23.39 × 1000 =
24. 24.1 + 2 + 3 + … + 55 =
25. 25.111 × 111 =
26. 26.Half of 56 =
27. 27.1 × 9 =
28. 28.Odd one out: which number is NOT in the 4 times table? (a) 16 (b) 20 (c) 12 (d) 15
29. 29.What comes next? 20, 26, 32, 38, ? (a) 45 (b) 44 (c) 50 (d) 38
30. 30.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.I thought of a number, multiplied it by 3 and added 2. I got 20. What was my number?
32. 32.What comes next? 4, 9, 16, 25, ? (a) 37 (b) 34 (c) 36 (d) 38
33. 33.9 × 5 =
34. 34.If today is Wednesday, what day will it be after 8 days? (a) Friday (b) Wednesday (c) Thursday (d) Sunday
35. 35.I thought of a number, multiplied it by 4 and added 2. I got 46. What was my number?
36. 36.9 × 5 = ?5 — what is the missing digit?
37. 37.Magic trick! Think of 2. Double it, add 16, halve it, then take away 2. What number do you get?
38. 38.6 × 4 =
39. 39.9 × 6 = ?4 — what is the missing digit?
40. 40.2?01 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?

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