Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 696 · 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 3 years a boy will be 15 years old. How old was he 5 years ago?
2. 2.9 × 1 =
3. 3.56 × 100 =
4. 4.What comes next? 2, 4, 8, 16, ? (a) 24 (b) 33 (c) 28 (d) 32
5. 5.The ages of two twins add up to 16. How old is each twin?
6. 6.Odd one out: which number is NOT in the 8 times table? (a) 56 (b) 32 (c) 40 (d) 77
7. 7.51 × 4 =
8. 8.41 × 4 =
9. 9.Odd one out: which number is NOT in the 7 times table? (a) 42 (b) 14 (c) 21 (d) 68
10. 10.9 × 4 = ?6 — what is the missing digit?
11. 11.Think of 3. Multiply it by 2, then add 1. What number do you end with?
12. 12.19 × 4 =
13. 13.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
14. 14.Magic square (every row, column and diagonal has the same total): 7 6 11 | 12 8 4 | ? 10 9. What is the missing number?
15. 15.4 × 9 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
17. 17.9 × 4 =
18. 18.Magic trick! Think of 9. Double it, add 14, halve it, then take away 9. What number do you get?
19. 19.111111 × 111111 =
20. 20.The 4th of a month is a Wednesday. What day is the 18th of the same month? (a) Saturday (b) Tuesday (c) Thursday (d) Wednesday
21. 21.59 × 10 =
22. 22.37 × 12 =
23. 23.Think of 2. Multiply it by 3, then add 2. What number do you end with?
24. 24.30 × 100 =
25. 25.Odd one out: which number is NOT in the 3 times table? (a) 9 (b) 21 (c) 7 (d) 18
26. 26.The ages of two twins add up to 14. How old is each twin?
27. 27.7 × 4 =
28. 28.Odd one out: which number is NOT in the 3 times table? (a) 9 (b) 11 (c) 12 (d) 18
29. 29.If today is Saturday, what day was it 59 days ago? (a) Thursday (b) Wednesday (c) Saturday (d) Tuesday
30. 30.If today is Tuesday, what day was it 21 days ago? (a) Wednesday (b) Friday (c) Tuesday (d) Monday
31. 31.I thought of a number, added 5 and then doubled it. I got 42. What was my number?
32. 32.113 × 10 =
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
34. 34.Magic square (every row, column and diagonal has the same total): 11 12 7 | ? 10 14 | 13 8 9. What is the missing number?
35. 35.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.9 × 8 = 7? — what is the missing digit?
37. 37.Magic square (every row, column and diagonal has the same total): 15 ? 11 | 8 12 16 | 13 14 9. What is the missing number?
38. 38.1 + 2 + 3 + … + 91 =
39. 39.1234 × 9 + 5 =
40. 40.Think of 11. Multiply it by 4, then add 9. What number do you end with?

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