Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 78 · 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.What comes next? 1, 2, 4, 8, ? (a) 14 (b) 16 (c) 17 (d) 12
2. 2.9 × 1 =
3. 3.Magic trick! Think of 12. Double it, add 16, halve it, then take away 12. What number do you get?
4. 4.What comes next? 1, 4, 9, 16, ? (a) 23 (b) 25 (c) 27 (d) 26
5. 5.Odd one out: which number is NOT in the 3 times table? (a) 6 (b) 19 (c) 15 (d) 21
6. 6.35 × 4 =
7. 7.Double 34 =
8. 8.9 × 6 =
9. 9.I thought of a number, multiplied it by 5 and added 3. I got 18. What was my number?
10. 10.82 × 100 =
11. 11.If today is Saturday, what day will it be after 67 days? (a) Thursday (b) Tuesday (c) Saturday (d) Wednesday
12. 12.1 + 2 + 3 + … + 40 =
13. 13.19 × 1000 =
14. 14.12345679 × 54 =
15. 15.I thought of a number, multiplied it by 5 and added 2. I got 12. What was my number?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
17. 17.1 + 3 + 5 + … + 19 =
18. 18.16 × 4 =
19. 19.4 × 9 =
20. 20.1 + 3 + 5 + … + 17 =
21. 21.?515 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
22. 22.9 × 10 = ?0 — what is the missing digit?
23. 23.8 × 9 =
24. 24.I thought of a number, multiplied it by 3 and added 9. I got 39. What was my number?
25. 25.1 + 2 + 3 + … + 31 =
26. 26.The 7th of a month is a Thursday. What day is the 28th of the same month? (a) Wednesday (b) Thursday (c) Friday (d) Sunday
27. 27.Double 21 =
28. 28.I thought of a number, added 9 and then doubled it. I got 54. What was my number?
29. 29.Odd one out: which number is NOT in the 8 times table? (a) 24 (b) 40 (c) 32 (d) 39
30. 30.?286 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
31. 31.Magic square (every row, column and diagonal has the same total): 6 16 14 | ? 12 4 | 10 8 18. What is the missing number?
32. 32.1 + 3 + 5 + … + 21 =
33. 33.21 × 4 =
34. 34.The 1st of a month is a Tuesday. What day is the 27th of the same month? (a) Wednesday (b) Saturday (c) Monday (d) Sunday
35. 35.5?90 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
36. 36.Magic trick! Think of 8. Double it, add 8, halve it, then take away 8. What number do you get?
37. 37.?142 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
38. 38.2 × ? = 2000
39. 39.You have 14 coins. Each coin is ₹1 or ₹2, and together they make ₹17. How many ₹2 coins do you have?
40. 40.Do the 1089 trick with 391: reverse and subtract, then reverse that answer and add. What do you get?

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