Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 879 · 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.Magic square (every row, column and diagonal has the same total): 10 9 14 | 15 11 7 | ? 13 12. What is the missing number?
2. 2.A girl is 7 years old and her brother is 5 years older. How old will her brother be in 6 years?
3. 3.Take 602. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.I thought of a number, added 2 and then doubled it. I got 40. What was my number?
5. 5.1 + 2 + 3 + … + 96 =
6. 6.327 × 10 =
7. 7.Double 64 =
8. 8.1 + 3 + 5 + … + 35 =
9. 9.1 + 2 + 3 + … + 66 =
10. 10.Double 43 =
11. 11.26 × 4 =
12. 12.I thought of a number, multiplied it by 3 and added 5. I got 14. What was my number?
13. 13.Magic trick! Think of 16. Double it, add 4, halve it, then take away 16. What number do you get?
14. 14.9 × 7 = 6? — what is the missing digit?
15. 15.?703 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
16. 16.The 9th of a month is a Thursday. What day is the 19th of the same month? (a) Sunday (b) Monday (c) Wednesday (d) Saturday
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
18. 18.If today is Tuesday, what day was it 48 days ago? (a) Saturday (b) Thursday (c) Wednesday (d) Tuesday
19. 19.Double 92 =
20. 20.14 × 4 =
21. 21.A piggy bank has 9 coins of ₹5 and 14 coins of ₹2. How many rupees are in it?
22. 22.Magic trick! Think of 15. Double it, add 12, halve it, then take away 15. What number do you get?
23. 23.9 × 8 =
24. 24.If today is Saturday, what day will it be after 56 days? (a) Tuesday (b) Saturday (c) Sunday (d) Friday
25. 25.Magic square (every row, column and diagonal has the same total): 22 12 14 | 8 ? 24 | 18 20 10. What is the missing number?
26. 26.Half of 22 =
27. 27.396 + 693 =
28. 28.9 × 2 = ?8 — what is the missing digit?
29. 29.1 + 2 + 3 + … + 46 =
30. 30.I thought of a number, added 1 and then doubled it. I got 36. What was my number?
31. 31.Odd one out: which number is NOT in the 3 times table? (a) 15 (b) 19 (c) 12 (d) 9
32. 32.I thought of a number, multiplied it by 3 and added 1. I got 34. What was my number?
33. 33.If today is Sunday, what day will it be after 97 days? (a) Saturday (b) Tuesday (c) Friday (d) Sunday
34. 34.4 × 9 =
35. 35.What comes next? 5, 10, 20, 40, ? (a) 80 (b) 70 (c) 60 (d) 81
36. 36.1 + 3 + 5 + … + 13 =
37. 37.9 × 8 = 7? — what is the missing digit?
38. 38.54 × 4 =
39. 39.Magic trick! Think of 8. Double it, add 6, halve it, then take away 8. What number do you get?
40. 40.If today is Saturday, what day was it 57 days ago? (a) Friday (b) Thursday (c) Monday (d) Saturday

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