Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 595 · 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 + … + 47 =
2. 2.If today is Sunday, what day will it be after 73 days? (a) Tuesday (b) Saturday (c) Wednesday (d) Thursday
3. 3.The ages of two twins add up to 14. How old is each twin?
4. 4.Double 36 =
5. 5.9 × 8 = ?2 — what is the missing digit?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.I thought of a number, added 3 and then doubled it. I got 26. What was my number?
8. 8.1 + 2 + 3 + … + 73 =
9. 9.What comes next? 8, 13, 18, 23, ? (a) 29 (b) 23 (c) 28 (d) 33
10. 10.34 × 4 =
11. 11.Double 94 =
12. 12.Magic trick! Think of 7. Double it, add 6, halve it, then take away 7. What number do you get?
13. 13.Magic trick! Think of 4. Double it, add 6, halve it, then take away 4. What number do you get?
14. 14.594 + 495 =
15. 15.What comes next? 1, 4, 9, 16, ? (a) 25 (b) 27 (c) 23 (d) 26
16. 16.11 × 11 =
17. 17.297 + 792 =
18. 18.9 × 6 = ?4 — what is the missing digit?
19. 19.2 × 9 =
20. 20.Magic trick! Think of 15. Double it, add 10, halve it, then take away 15. What number do you get?
21. 21.49 × 4 =
22. 22.254? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
23. 23.26 × 4 =
24. 24.A piggy bank has 4 coins of ₹5 and 5 coins of ₹2. How many rupees are in it?
25. 25.9 × 10 =
26. 26.If today is Friday, what day was it 38 days ago? (a) Tuesday (b) Wednesday (c) Friday (d) Monday
27. 27.Take 339. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.9 × 4 = 3? — what is the missing digit?
29. 29.Magic square (every row, column and diagonal has the same total): 7 8 3 | 2 6 10 | ? 4 5. What is the missing number?
30. 30.46 × 100 =
31. 31.Magic square (every row, column and diagonal has the same total): 20 6 16 | ? 14 18 | 12 22 8. What is the missing number?
32. 32.You have 14 coins. Each coin is ₹1 or ₹2, and together they make ₹20. How many ₹2 coins do you have?
33. 33.9 × 6 = 5? — what is the missing digit?
34. 34.Think of 8. Multiply it by 2, then add 8. What number do you end with?
35. 35.16 × 4 =
36. 36.I thought of a number, multiplied it by 5 and added 8. I got 23. What was my number?
37. 37.495 + 594 =
38. 38.Take 674. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.42 × 4 =
40. 40.9 × 3 =

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