Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 574 · 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.Magic square (every row, column and diagonal has the same total): 13 34 ? | 28 22 16 | 25 10 31. What is the missing number?
2. 2.Take 230. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Double 46 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.1 + 2 + 3 + … + 99 =
6. 6.12345678 × 9 + 9 =
7. 7.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.1 + 2 + 3 + … + 43 =
9. 9.If today is Wednesday, what day will it be after 22 days? (a) Friday (b) Thursday (c) Wednesday (d) Sunday
10. 10.1 + 2 + 3 + … + 45 =
11. 11.You have 10 coins. Each coin is ₹1 or ₹2, and together they make ₹11. How many ₹2 coins do you have?
12. 12.If today is Saturday, what day will it be after 86 days? (a) Monday (b) Tuesday (c) Thursday (d) Sunday
13. 13.Magic square (every row, column and diagonal has the same total): 13 11 21 | 23 ? 7 | 9 19 17. What is the missing number?
14. 14.If today is Saturday, what day was it 29 days ago? (a) Monday (b) Friday (c) Saturday (d) Thursday
15. 15.12345 × 8 + 5 =
16. 16.27 × ? = 27000
17. 17.Magic square (every row, column and diagonal has the same total): 6 ? 4 | 5 7 9 | 10 3 8. What is the missing number?
18. 18.30 × 1000 =
19. 19.What comes next? 11, 15, 19, 23, ? (a) 23 (b) 27 (c) 31 (d) 28
20. 20.Think of 9. Multiply it by 4, then add 8. What number do you end with?
21. 21.5 × 9 =
22. 22.Do the 1089 trick with 338: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.75 × ? = 7500
24. 24.9 × 9 =
25. 25.12 × 8 + 2 =
26. 26.14 × 4 =
27. 27.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.57 × 4 =
29. 29.9 × 5 = ?5 — what is the missing digit?
30. 30.A piggy bank has 12 coins of ₹5 and 3 coins of ₹2. How many rupees are in it?
31. 31.Magic square (every row, column and diagonal has the same total): 3 8 7 | ? 6 2 | 5 4 9. What is the missing number?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
33. 33.941 × 10 =
34. 34.Half of 48 =
35. 35.If today is Wednesday, what day will it be after 21 days? (a) Saturday (b) Wednesday (c) Tuesday (d) Thursday
36. 36.?053 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
37. 37.Half of 62 =
38. 38.Think of 4. Multiply it by 5, then add 9. What number do you end with?
39. 39.46 × 4 =
40. 40.?004 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?

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