Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 773 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
2. 2.28 × 4 =
3. 3.11 × 4 =
4. 4.37 × 3 =
5. 5.Magic trick! Think of 2. Double it, add 6, halve it, then take away 2. What number do you get?
6. 6.18 × 4 =
7. 7.346 × 10 =
8. 8.Magic square (every row, column and diagonal has the same total): 20 10 ? | 22 18 14 | 12 26 16. What is the missing number?
9. 9.You have 5 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
10. 10.27 × ? = 2700
11. 11.478? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
12. 12.1 + 3 + 5 + … + 23 =
13. 13.I thought of a number, multiplied it by 3 and added 7. I got 13. What was my number?
14. 14.Half of 68 =
15. 15.12345679 × 81 =
16. 16.37 × 12 =
17. 17.55 × 4 =
18. 18.If today is Sunday, what day was it 30 days ago? (a) Thursday (b) Monday (c) Saturday (d) Friday
19. 19.53 × ? = 5300
20. 20.Take 286. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.250 × 10 =
22. 22.A piggy bank has 6 coins of ₹5 and 10 coins of ₹2. How many rupees are in it?
23. 23.578 × 10 =
24. 24.Half of 24 =
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
26. 26.If today is Wednesday, what day will it be after 21 days? (a) Thursday (b) Tuesday (c) Saturday (d) Wednesday
27. 27.Half of 32 =
28. 28.Magic square (every row, column and diagonal has the same total): 10 15 14 | 17 13 9 | 12 11 ?. What is the missing number?
29. 29.9 × 4 = 3? — what is the missing digit?
30. 30.8 × 4 =
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
32. 32.What comes next? 3, 6, 12, 24, ? (a) 49 (b) 48 (c) 42 (d) 36
33. 33.Magic square (every row, column and diagonal has the same total): 4 3 8 | 9 5 1 | 2 7 ?. What is the missing number?
34. 34.Double 82 =
35. 35.Take 957. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Magic square (every row, column and diagonal has the same total): 11 10 15 | 16 12 8 | ? 14 13. What is the missing number?
37. 37.1 + 2 + 3 + … + 97 =
38. 38.?50 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
39. 39.37 × 6 =
40. 40.9 × 100 =

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