Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 988 · 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 5 years a boy will be 14 years old. How old was he 5 years ago?
2. 2.1234567 × 8 + 7 =
3. 3.If today is Monday, what day will it be after 92 days? (a) Wednesday (b) Monday (c) Friday (d) Tuesday
4. 4.9 × 2 = ?8 — what is the missing digit?
5. 5.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
6. 6.Odd one out: which number is NOT in the 7 times table? (a) 14 (b) 28 (c) 19 (d) 21
7. 7.9 × 5 = 4? — what is the missing digit?
8. 8.Double 92 =
9. 9.5 × 9 =
10. 10.The 1st of a month is a Friday. What day is the 9th of the same month? (a) Saturday (b) Sunday (c) Friday (d) Tuesday
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
12. 12.Double 35 =
13. 13.A girl is 12 years old and her brother is 6 years older. How old will her brother be in 3 years?
14. 14.9 × 3 = ?7 — what is the missing digit?
15. 15.Double 34 =
16. 16.15?3 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
17. 17.51 × 10 =
18. 18.Magic square (every row, column and diagonal has the same total): 21 11 13 | ? 15 23 | 17 19 9. What is the missing number?
19. 19.9 × 5 = ?5 — what is the missing digit?
20. 20.42 × 4 =
21. 21.11 × 11 =
22. 22.You have 13 coins. Each coin is ₹1 or ₹2, and together they make ₹18. How many ₹2 coins do you have?
23. 23.Half of 188 =
24. 24.If today is Monday, what day was it 45 days ago? (a) Monday (b) Saturday (c) Thursday (d) Friday
25. 25.What comes next? 1, 2, 4, 8, ? (a) 14 (b) 16 (c) 17 (d) 12
26. 26.Magic square (every row, column and diagonal has the same total): 20 17 32 | 35 23 11 | 14 ? 26. What is the missing number?
27. 27.98 × ? = 9800
28. 28.12345679 × 18 =
29. 29.42 × 100 =
30. 30.12345 × 8 + 5 =
31. 31.50 × 4 =
32. 32.The ages of two twins add up to 8. How old is each twin?
33. 33.If today is Saturday, what day will it be after 84 days? (a) Saturday (b) Friday (c) Tuesday (d) Sunday
34. 34.Take 89 and take away the sum of its digits. What do you get?
35. 35.9 × 4 =
36. 36.Odd one out: which number is NOT in the 3 times table? (a) 27 (b) 9 (c) 18 (d) 25
37. 37.Magic square (every row, column and diagonal has the same total): ? 3 17 | 15 11 7 | 5 19 9. What is the missing number?
38. 38.7 × 9 =
39. 39.844 × 10 =
40. 40.Magic square (every row, column and diagonal has the same total): 16 6 20 | 18 14 10 | 8 ? 12. What is the missing number?

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