Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 496 · 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. 1.9 × 4 = ?6 — what is the missing digit?
2. 2.162? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
3. 3.9 × 2 =
4. 4.4 × 9 =
5. 5.What comes next? 18, 23, 28, 33, ? (a) 38 (b) 33 (c) 43 (d) 39
6. 6.887 × 10 =
7. 7.The 2nd of a month is a Sunday. What day is the 18th of the same month? (a) Tuesday (b) Monday (c) Friday (d) Wednesday
8. 8.10 × 1000 =
9. 9.12345679 × 9 =
10. 10.Do the 1089 trick with 943: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.What comes next? 1, 2, 4, 8, ? (a) 17 (b) 16 (c) 12 (d) 14
12. 12.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.1 × 9 =
14. 14.37 × 1000 =
15. 15.What comes next? 2, 4, 8, 16, ? (a) 33 (b) 24 (c) 32 (d) 28
16. 16.25 × 10 =
17. 17.What comes next? 16, 25, 36, 49, ? (a) 65 (b) 62 (c) 66 (d) 64
18. 18.10 × 4 =
19. 19.You have 8 coins. Each coin is ₹1 or ₹2, and together they make ₹10. How many ₹2 coins do you have?
20. 20.1 + 2 + 3 + … + 47 =
21. 21.39 × 4 =
22. 22.Think of 3. Multiply it by 5, then add 6. What number do you end with?
23. 23.9 × 7 = ?3 — what is the missing digit?
24. 24.7 × 4 =
25. 25.495 + 594 =
26. 26.If today is Friday, what day was it 35 days ago? (a) Friday (b) Monday (c) Saturday (d) Thursday
27. 27.Double 33 =
28. 28.3 × 9 =
29. 29.Double 98 =
30. 30.8 × 9 =
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
32. 32.494 × 10 =
33. 33.11111 × 11111 =
34. 34.Odd one out: which number is NOT in the 8 times table? (a) 40 (b) 70 (c) 32 (d) 24
35. 35.28 × 4 =
36. 36.Think of 6. Multiply it by 3, then add 1. What number do you end with?
37. 37.Odd one out: which number is NOT in the 4 times table? (a) 16 (b) 28 (c) 20 (d) 13
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
39. 39.I thought of a number, multiplied it by 5 and added 4. I got 69. What was my number?
40. 40.41?4 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?

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