Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 230 · 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. 1.63 × ? = 6300
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.What comes next? 2, 4, 8, 16, ? (a) 28 (b) 33 (c) 32 (d) 24
4. 4.Think of 15. Multiply it by 5, then add 9. What number do you end with?
5. 5.9 × 7 = ?3 — what is the missing digit?
6. 6.I thought of a number, multiplied it by 2 and added 7. I got 37. What was my number?
7. 7.Double 65 =
8. 8.12345678 × 9 + 9 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
10. 10.37 × 9 =
11. 11.Take 95 and take away the sum of its digits. What do you get?
12. 12.9 × 7 =
13. 13.If today is Sunday, what day was it 9 days ago? (a) Friday (b) Monday (c) Saturday (d) Thursday
14. 14.Double 49 =
15. 15.What comes next? 16, 25, 36, 49, ? (a) 64 (b) 62 (c) 65 (d) 66
16. 16.Double 24 =
17. 17.23 × 4 =
18. 18.1?4 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
19. 19.9 × 2 = 1? — what is the missing digit?
20. 20.37 × 3 =
21. 21.Half of 14 =
22. 22.Take 106. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Magic square (every row, column and diagonal has the same total): 14 29 26 | 35 23 11 | 20 17 ?. What is the missing number?
25. 25.The ages of two twins add up to 8. How old is each twin?
26. 26.9 × 6 =
27. 27.53 × 4 =
28. 28.45 × 4 =
29. 29.9 × 8 = 7? — what is the missing digit?
30. 30.1 + 3 + 5 + … + 47 =
31. 31.You have 14 coins. Each coin is ₹1 or ₹2, and together they make ₹26. How many ₹2 coins do you have?
32. 32.The 2nd of a month is a Sunday. What day is the 25th of the same month? (a) Friday (b) Wednesday (c) Monday (d) Tuesday
33. 33.Magic square (every row, column and diagonal has the same total): ? 33 18 | 27 21 15 | 24 9 30. What is the missing number?
34. 34.If today is Monday, what day will it be after 34 days? (a) Monday (b) Saturday (c) Sunday (d) Wednesday
35. 35.9 × 5 = ?5 — what is the missing digit?
36. 36.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.50 × 4 =
38. 38.Magic square (every row, column and diagonal has the same total): 28 13 16 | 7 19 ? | 22 25 10. What is the missing number?
39. 39.If today is Monday, what day was it 40 days ago? (a) Wednesday (b) Tuesday (c) Thursday (d) Saturday
40. 40.9 × 2 =

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