Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 875 · 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.Half of 58 =
2. 2.1 + 3 + 5 + … + 45 =
3. 3.9 × 4 = ?6 — what is the missing digit?
4. 4.1 + 3 + 5 + … + 21 =
5. 5.You have 9 coins. Each coin is ₹1 or ₹2, and together they make ₹11. How many ₹2 coins do you have?
6. 6.What comes next? 12, 15, 18, 21, ? (a) 21 (b) 27 (c) 24 (d) 25
7. 7.?401 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
8. 8.37 × 21 =
9. 9.9 × 4 = 3? — what is the missing digit?
10. 10.Double 41 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
12. 12.9 × 10 =
13. 13.Odd one out: which number is NOT in the 5 times table? (a) 39 (b) 20 (c) 15 (d) 10
14. 14.Odd one out: which number is NOT in the 5 times table? (a) 20 (b) 30 (c) 26 (d) 25
15. 15.46 × 100 =
16. 16.9 × 3 = ?7 — what is the missing digit?
17. 17.9 × 9 = 8? — what is the missing digit?
18. 18.6 × 100 =
19. 19.I thought of a number, multiplied it by 5 and added 4. I got 74. What was my number?
20. 20.28 × 4 =
21. 21.If today is Sunday, what day will it be after 45 days? (a) Tuesday (b) Thursday (c) Wednesday (d) Saturday
22. 22.Half of 156 =
23. 23.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Half of 46 =
25. 25.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Magic square (every row, column and diagonal has the same total): 7 ? 9 | 12 10 8 | 11 6 13. What is the missing number?
27. 27.12345679 × 27 =
28. 28.Magic square (every row, column and diagonal has the same total): ? 14 7 | 8 10 12 | 13 6 11. What is the missing number?
29. 29.If today is Saturday, what day will it be after 68 days? (a) Wednesday (b) Sunday (c) Thursday (d) Friday
30. 30.536 × ? = 5360
31. 31.24 × 4 =
32. 32.1234567 × 8 + 7 =
33. 33.Magic square (every row, column and diagonal has the same total): 11 18 13 | ? 14 12 | 15 10 17. What is the missing number?
34. 34.Half of 178 =
35. 35.33 × 100 =
36. 36.9 × 10 = ?0 — what is the missing digit?
37. 37.?985 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
38. 38.591 × 10 =
39. 39.Do the 1089 trick with 648: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Magic square (every row, column and diagonal has the same total): 5 12 7 | 10 8 ? | 9 4 11. What is the missing number?

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