Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 298 · 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. 1.1234 × 8 + 4 =
2. 2.47 × 4 =
3. 3.A piggy bank has 8 coins of ₹5 and 15 coins of ₹2. How many rupees are in it?
4. 4.11 × 11 =
5. 5.Magic square (every row, column and diagonal has the same total): 8 ? 4 | 3 7 11 | 10 5 6. What is the missing number?
6. 6.45 × ? = 45000
7. 7.8 × 9 =
8. 8.21 × ? = 21000
9. 9.A piggy bank has 5 coins of ₹5 and 5 coins of ₹2. How many rupees are in it?
10. 10.Half of 156 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
12. 12.51 × 4 =
13. 13.44 × 4 =
14. 14.What comes next? 1, 4, 9, 16, ? (a) 26 (b) 27 (c) 25 (d) 23
15. 15.9 × 9 =
16. 16.Magic trick! Think of 9. Double it, add 4, halve it, then take away 9. What number do you get?
17. 17.1 + 2 + 3 + … + 34 =
18. 18.Double 79 =
19. 19.1234567 × 8 + 7 =
20. 20.Magic square (every row, column and diagonal has the same total): 4 14 12 | 18 10 2 | 8 ? 16. What is the missing number?
21. 21.63 × 100 =
22. 22.78 × 100 =
23. 23.48 × ? = 48000
24. 24.6 × 4 =
25. 25.If today is Wednesday, what day will it be after 31 days? (a) Sunday (b) Friday (c) Saturday (d) Tuesday
26. 26.9 × 3 = 2? — what is the missing digit?
27. 27.Do the 1089 trick with 537: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.30 × 4 =
29. 29.Take 944. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.A father is 38 years old and his son is 10. How old was the father when the son was born?
31. 31.In 6 years a boy will be 15 years old. How old was he 2 years ago?
32. 32.9 × 1 =
33. 33.9 × 8 = ?2 — what is the missing digit?
34. 34.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹8. How many ₹2 coins do you have?
35. 35.I thought of a number, multiplied it by 2 and added 2. I got 14. What was my number?
36. 36.218 × 10 =
37. 37.891 + 198 =
38. 38.18 × 4 =
39. 39.578? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
40. 40.What comes next? 16, 25, 36, 49, ? (a) 66 (b) 62 (c) 65 (d) 64

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