Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 640 · 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.Think of 2. Multiply it by 5, then add 2. What number do you end with?
2. 2.Magic square (every row, column and diagonal has the same total): 9 2 7 | 4 6 8 | ? 10 3. What is the missing number?
3. 3.What comes next? 5, 10, 20, 40, ? (a) 80 (b) 60 (c) 70 (d) 81
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
5. 5.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
6. 6.Half of 126 =
7. 7.32 × ? = 32000
8. 8.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹23. How many ₹2 coins do you have?
9. 9.What comes next? 6, 9, 12, 15, ? (a) 18 (b) 21 (c) 19 (d) 15
10. 10.8 × ? = 800
11. 11.12345 × 9 + 6 =
12. 12.5 × 9 =
13. 13.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.If today is Thursday, what day was it 29 days ago? (a) Tuesday (b) Wednesday (c) Thursday (d) Saturday
15. 15.198 + 891 =
16. 16.9 × 5 = 4? — what is the missing digit?
17. 17.6?81 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
18. 18.9 × 3 = 2? — what is the missing digit?
19. 19.Half of 154 =
20. 20.What comes next? 2, 4, 8, 16, ? (a) 32 (b) 33 (c) 24 (d) 28
21. 21.246 × 10 =
22. 22.In 4 years a boy will be 16 years old. How old was he 6 years ago?
23. 23.1111 × 1111 =
24. 24.538 × 10 =
25. 25.8 × ? = 8000
26. 26.58 × 4 =
27. 27.Odd one out: which number is NOT in the 5 times table? (a) 30 (b) 37 (c) 15 (d) 25
28. 28.Half of 148 =
29. 29.Odd one out: which number is NOT in the 5 times table? (a) 30 (b) 15 (c) 14 (d) 40
30. 30.441 × ? = 4410
31. 31.A father is 42 years old and his son is 8. How old was the father when the son was born?
32. 32.1 + 2 + 3 + … + 94 =
33. 33.I thought of a number, multiplied it by 5 and added 7. I got 72. What was my number?
34. 34.37 × 12 =
35. 35.1 + 2 + 3 + … + 18 =
36. 36.1 + 2 + 3 + … + 63 =
37. 37.Half of 24 =
38. 38.I thought of a number, multiplied it by 2 and added 2. I got 6. What was my number?
39. 39.1 + 2 + 3 + … + 66 =
40. 40.Half of 46 =

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