Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 637 · 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. 1.1 + 3 + 5 + … + 13 =
2. 2.Magic square (every row, column and diagonal has the same total): 18 4 14 | ? 12 16 | 10 20 6. What is the missing number?
3. 3.Magic square (every row, column and diagonal has the same total): 14 4 ? | 16 12 8 | 6 20 10. What is the missing number?
4. 4.123 × 9 + 4 =
5. 5.37 × 15 =
6. 6.If today is Tuesday, what day will it be after 52 days? (a) Friday (b) Saturday (c) Monday (d) Thursday
7. 7.5?0 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
8. 8.Double 62 =
9. 9.Think of 5. Multiply it by 4, then add 8. What number do you end with?
10. 10.13 × 100 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
12. 12.Magic square (every row, column and diagonal has the same total): 30 15 18 | 9 21 33 | 24 27 ?. What is the missing number?
13. 13.?303 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
14. 14.34 × 4 =
15. 15.9 × 8 = ?2 — what is the missing digit?
16. 16.A piggy bank has 9 coins of ₹5 and 5 coins of ₹2. How many rupees are in it?
17. 17.957 × 10 =
18. 18.12345679 × 36 =
19. 19.123456789 × 8 + 9 =
20. 20.What comes next? 1, 2, 4, 8, ? (a) 14 (b) 17 (c) 16 (d) 12
21. 21.44 × ? = 4400
22. 22.9 × 3 = ?7 — what is the missing digit?
23. 23.1 + 2 + 3 + … + 66 =
24. 24.A father is 40 years old and his son is 8. How old was the father when the son was born?
25. 25.9 × 1 =
26. 26.A girl is 8 years old and her brother is 2 years older. How old will her brother be in 4 years?
27. 27.The 6th of a month is a Saturday. What day is the 17th of the same month? (a) Thursday (b) Saturday (c) Wednesday (d) Tuesday
28. 28.Double 18 =
29. 29.Magic square (every row, column and diagonal has the same total): ? 29 14 | 11 23 35 | 32 17 20. What is the missing number?
30. 30.The ages of two twins add up to 18. How old is each twin?
31. 31.642? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
32. 32.The ages of two twins add up to 28. How old is each twin?
33. 33.1 + 2 + 3 + … + 36 =
34. 34.1 + 2 + 3 + … + 83 =
35. 35.I thought of a number, multiplied it by 2 and added 4. I got 34. What was my number?
36. 36.Take 154. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.1 + 2 + 3 + … + 94 =
38. 38.A girl is 5 years old and her brother is 2 years older. How old will her brother be in 5 years?
39. 39.Double 41 =
40. 40.693 + 396 =

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