Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 807 · 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. 1.44 × 4 =
2. 2.297 + 792 =
3. 3.Magic square (every row, column and diagonal has the same total): ? 5 26 | 23 17 11 | 8 29 14. What is the missing number?
4. 4.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.30 × 1000 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Odd one out: which number is NOT in the 8 times table? (a) 48 (b) 16 (c) 52 (d) 32
9. 9.The 4th of a month is a Friday. What day is the 13th of the same month? (a) Wednesday (b) Sunday (c) Saturday (d) Monday
10. 10.36 × 4 =
11. 11.Take 77 and take away the sum of its digits. What do you get?
12. 12.7 × 100 =
13. 13.12345 × 8 + 5 =
14. 14.If today is Thursday, what day was it 50 days ago? (a) Tuesday (b) Saturday (c) Wednesday (d) Thursday
15. 15.Double 82 =
16. 16.What comes next? 1, 6, 11, 16, ? (a) 22 (b) 26 (c) 21 (d) 16
17. 17.9 × 7 = 6? — what is the missing digit?
18. 18.Magic square (every row, column and diagonal has the same total): 13 14 9 | ? 12 16 | 15 10 11. What is the missing number?
19. 19.2 × ? = 200
20. 20.3 × 9 =
21. 21.6 × 9 =
22. 22.What comes next? 4, 9, 16, 25, ? (a) 34 (b) 38 (c) 37 (d) 36
23. 23.81 × 100 =
24. 24.1 + 2 + 3 + … + 33 =
25. 25.What comes next? 3, 7, 11, 15, ? (a) 15 (b) 20 (c) 19 (d) 23
26. 26.57 × 4 =
27. 27.14?2 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
28. 28.What comes next? 1, 10, 19, 28, ? (a) 38 (b) 28 (c) 46 (d) 37
29. 29.The ages of two twins add up to 16. How old is each twin?
30. 30.If today is Monday, what day will it be after 18 days? (a) Monday (b) Thursday (c) Friday (d) Saturday
31. 31.9 × 9 = ?1 — what is the missing digit?
32. 32.?83 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
33. 33.1 × 9 =
34. 34.Magic square (every row, column and diagonal has the same total): 6 13 8 | 11 9 7 | 10 5 ?. What is the missing number?
35. 35.15?9 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
36. 36.971 × ? = 9710
37. 37.A girl is 7 years old and her brother is 3 years older. How old will her brother be in 7 years?
38. 38.A piggy bank has 8 coins of ₹5 and 7 coins of ₹2. How many rupees are in it?
39. 39.Double 34 =
40. 40.I thought of a number, multiplied it by 2 and added 2. I got 14. What was my number?

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