Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 852 · 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.If today is Monday, what day was it 10 days ago? (a) Thursday (b) Monday (c) Saturday (d) Friday
2. 2.The ages of two twins add up to 10. How old is each twin?
3. 3.1 + 2 + 3 + … + 33 =
4. 4.Double 34 =
5. 5.Half of 48 =
6. 6.Half of 94 =
7. 7.Take 69 and take away the sum of its digits. What do you get?
8. 8.Take 593. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.37 × 24 =
10. 10.A father is 39 years old and his son is 14. How old was the father when the son was born?
11. 11.The 9th of a month is a Monday. What day is the 25th of the same month? (a) Thursday (b) Saturday (c) Tuesday (d) Wednesday
12. 12.20 × 4 =
13. 13.1 + 3 + 5 + … + 25 =
14. 14.73?7 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
15. 15.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹23. How many ₹2 coins do you have?
16. 16.1 + 3 + 5 + … + 11 =
17. 17.Magic square (every row, column and diagonal has the same total): 6 11 4 | 5 7 9 | ? 3 8. What is the missing number?
18. 18.17 × 4 =
19. 19.9 × 8 = 7? — what is the missing digit?
20. 20.642 × 10 =
21. 21.Double 41 =
22. 22.9 × 4 = 3? — what is the missing digit?
23. 23.38 × 4 =
24. 24.Magic square (every row, column and diagonal has the same total): 12 17 10 | 11 13 15 | ? 9 14. What is the missing number?
25. 25.A girl is 10 years old and her brother is 2 years older. How old will her brother be in 9 years?
26. 26.64 × 10 =
27. 27.9 × 9 =
28. 28.16 × ? = 1600
29. 29.Half of 26 =
30. 30.26 × 4 =
31. 31.8 × 4 =
32. 32.1 + 2 + 3 + … + 74 =
33. 33.1 + 3 + 5 + … + 29 =
34. 34.Odd one out: which number is NOT in the 5 times table? (a) 25 (b) 11 (c) 15 (d) 10
35. 35.Magic square (every row, column and diagonal has the same total): 13 ? 9 | 11 15 19 | 21 7 17. What is the missing number?
36. 36.Magic square (every row, column and diagonal has the same total): 7 21 11 | 17 13 9 | ? 5 19. What is the missing number?
37. 37.396 + 693 =
38. 38.12 × 8 + 2 =
39. 39.What comes next? 14, 17, 20, 23, ? (a) 29 (b) 27 (c) 26 (d) 23
40. 40.6 × 4 =

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