Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 873 · 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 Sunday, what day will it be after 97 days? (a) Sunday (b) Tuesday (c) Friday (d) Saturday
2. 2.9 × 9 =
3. 3.5 × 9 =
4. 4.If today is Tuesday, what day will it be after 29 days? (a) Thursday (b) Saturday (c) Tuesday (d) Wednesday
5. 5.?87 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
6. 6.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Magic square (every row, column and diagonal has the same total): 10 20 18 | 24 16 8 | 14 ? 22. What is the missing number?
8. 8.753? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
9. 9.37 × ? = 3700
10. 10.Magic square (every row, column and diagonal has the same total): 14 15 10 | 9 13 17 | ? 11 12. What is the missing number?
11. 11.Double 81 =
12. 12.42 × 1000 =
13. 13.198 + 891 =
14. 14.2 × 9 =
15. 15.I thought of a number, multiplied it by 4 and added 7. I got 47. What was my number?
16. 16.Take 28 and take away the sum of its digits. What do you get?
17. 17.37 × 24 =
18. 18.Magic square (every row, column and diagonal has the same total): 6 7 ? | 1 5 9 | 8 3 4. What is the missing number?
19. 19.1 + 2 + 3 + … + 14 =
20. 20.What comes next? 4, 8, 16, 32, ? (a) 64 (b) 48 (c) 56 (d) 65
21. 21.1 + 3 + 5 + … + 13 =
22. 22.11 × 11 =
23. 23.If today is Tuesday, what day was it 47 days ago? (a) Friday (b) Sunday (c) Thursday (d) Wednesday
24. 24.7 × 4 =
25. 25.The ages of two twins add up to 18. How old is each twin?
26. 26.53 × 4 =
27. 27.410 × 10 =
28. 28.What comes next? 18, 26, 34, 42, ? (a) 50 (b) 51 (c) 42 (d) 58
29. 29.Think of 2. Multiply it by 2, then add 6. What number do you end with?
30. 30.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹11. How many ₹2 coins do you have?
31. 31.57 × 10 =
32. 32.1 + 2 + 3 + … + 9 =
33. 33.Do the 1089 trick with 185: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.1 + 2 + 3 + … + 42 =
35. 35.836? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
36. 36.22 × 4 =
37. 37.Take 589. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.You have 10 coins. Each coin is ₹1 or ₹2, and together they make ₹13. How many ₹2 coins do you have?
39. 39.What comes next? 3, 12, 21, 30, ? (a) 40 (b) 39 (c) 30 (d) 48
40. 40.1 + 3 + 5 + … + 47 =

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