Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 572 · 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): 30 9 24 | ? 21 27 | 18 33 12. What is the missing number?
2. 2.What comes next? 36, 49, 64, 81, ? (a) 102 (b) 100 (c) 98 (d) 101
3. 3.What comes next? 4, 8, 16, 32, ? (a) 56 (b) 65 (c) 48 (d) 64
4. 4.You have 13 coins. Each coin is ₹1 or ₹2, and together they make ₹14. How many ₹2 coins do you have?
5. 5.What comes next? 2, 4, 8, 16, ? (a) 32 (b) 33 (c) 24 (d) 28
6. 6.The ages of two twins add up to 18. How old is each twin?
7. 7.Magic square (every row, column and diagonal has the same total): 11 18 13 | 16 14 12 | ? 10 17. What is the missing number?
8. 8.198 + 891 =
9. 9.1234567 × 9 + 8 =
10. 10.24 × 4 =
11. 11.36 × 4 =
12. 12.Double 76 =
13. 13.What comes next? 4, 9, 16, 25, ? (a) 37 (b) 34 (c) 38 (d) 36
14. 14.If today is Monday, what day will it be after 86 days? (a) Thursday (b) Tuesday (c) Saturday (d) Wednesday
15. 15.If today is Monday, what day will it be after 77 days? (a) Tuesday (b) Sunday (c) Monday (d) Thursday
16. 16.22 × 4 =
17. 17.3 × 9 =
18. 18.If today is Monday, what day was it 48 days ago? (a) Friday (b) Monday (c) Tuesday (d) Wednesday
19. 19.165 × ? = 1650
20. 20.The ages of two twins add up to 28. How old is each twin?
21. 21.693 + 396 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
23. 23.Do the 1089 trick with 742: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Magic trick! Think of 19. Double it, add 16, halve it, then take away 19. What number do you get?
25. 25.48 × 4 =
26. 26.Double 73 =
27. 27.Odd one out: which number is NOT in the 3 times table? (a) 10 (b) 24 (c) 9 (d) 15
28. 28.Take 321. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.757 × ? = 7570
30. 30.Take 866. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.9 × 9 = ?1 — what is the missing digit?
32. 32.31 × 1000 =
33. 33.9 × 2 = 1? — what is the missing digit?
34. 34.Take 29 and take away the sum of its digits. What do you get?
35. 35.Do the 1089 trick with 366: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.57 × 4 =
37. 37.?419 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
38. 38.71 × 100 =
39. 39.If today is Saturday, what day was it 30 days ago? (a) Wednesday (b) Friday (c) Sunday (d) Thursday
40. 40.Magic square (every row, column and diagonal has the same total): 9 8 13 | 14 10 6 | 7 12 ?. What is the missing number?

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