Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 533 · 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.A piggy bank has 12 coins of ₹5 and 15 coins of ₹2. How many rupees are in it?
2. 2.Half of 188 =
3. 3.Double 48 =
4. 4.Take 76 and take away the sum of its digits. What do you get?
5. 5.Odd one out: which number is NOT in the 6 times table? (a) 30 (b) 42 (c) 16 (d) 12
6. 6.I thought of a number, added 8 and then doubled it. I got 36. What was my number?
7. 7.357 × ? = 3570
8. 8.Take 177. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.286 × 10 =
10. 10.20 × 4 =
11. 11.5 × 9 =
12. 12.9 × 4 =
13. 13.12345679 × 54 =
14. 14.1111 × 1111 =
15. 15.Magic square (every row, column and diagonal has the same total): 19 21 11 | 9 17 25 | 23 ? 15. What is the missing number?
16. 16.1?54 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
17. 17.Half of 126 =
18. 18.9 × 6 = ?4 — what is the missing digit?
19. 19.Do the 1089 trick with 664: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Magic square (every row, column and diagonal has the same total): 8 3 10 | 9 7 5 | ? 11 6. What is the missing number?
21. 21.123456 × 9 + 7 =
22. 22.I thought of a number, multiplied it by 2 and added 9. I got 33. What was my number?
23. 23.48 × 1000 =
24. 24.What comes next? 3, 6, 12, 24, ? (a) 36 (b) 48 (c) 49 (d) 42
25. 25.Do the 1089 trick with 267: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.1 + 2 + 3 + … + 13 =
27. 27.9 × 9 =
28. 28.I thought of a number, added 1 and then doubled it. I got 18. What was my number?
29. 29.The 3rd of a month is a Wednesday. What day is the 30th of the same month? (a) Tuesday (b) Monday (c) Wednesday (d) Friday
30. 30.1 + 3 + 5 + … + 27 =
31. 31.198 + 891 =
32. 32.13 × 1000 =
33. 33.9 × 6 = 5? — what is the missing digit?
34. 34.1 + 2 + 3 + … + 30 =
35. 35.Take 28 and take away the sum of its digits. What do you get?
36. 36.748 × 10 =
37. 37.You have 5 coins. Each coin is ₹1 or ₹2, and together they make ₹8. How many ₹2 coins do you have?
38. 38.1 + 2 + 3 + … + 69 =
39. 39.36 × 4 =
40. 40.Think of 7. Multiply it by 2, then add 2. What number do you end with?

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