Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 117 · 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.What comes next? 9, 16, 25, 36, ? (a) 50 (b) 51 (c) 47 (d) 49
2. 2.1?06 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
3. 3.407 × ? = 4070
4. 4.16 × 4 =
5. 5.69?0 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
6. 6.10 × 9 =
7. 7.3 × 100 =
8. 8.I thought of a number, added 2 and then doubled it. I got 16. What was my number?
9. 9.19 × 4 =
10. 10.Double 25 =
11. 11.Take 715. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.9 × 4 =
13. 13.Double 63 =
14. 14.The 5th of a month is a Monday. What day is the 26th of the same month? (a) Thursday (b) Sunday (c) Monday (d) Tuesday
15. 15.118 × 10 =
16. 16.The 2nd of a month is a Sunday. What day is the 12th of the same month? (a) Tuesday (b) Thursday (c) Wednesday (d) Saturday
17. 17.A father is 34 years old and his son is 4. How old was the father when the son was born?
18. 18.1 + 3 + 5 + … + 19 =
19. 19.9 × 3 = 2? — what is the missing digit?
20. 20.Take 16 and take away the sum of its digits. What do you get?
21. 21.9 × 10 = 9? — what is the missing digit?
22. 22.Odd one out: which number is NOT in the 6 times table? (a) 48 (b) 34 (c) 30 (d) 12
23. 23.A piggy bank has 2 coins of ₹5 and 7 coins of ₹2. How many rupees are in it?
24. 24.Half of 32 =
25. 25.Half of 96 =
26. 26.57?2 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
27. 27.4?00 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
28. 28.Double 22 =
29. 29.Take 22 and take away the sum of its digits. What do you get?
30. 30.22 × 4 =
31. 31.11 × 1000 =
32. 32.881 × ? = 8810
33. 33.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.If today is Monday, what day will it be after 73 days? (a) Sunday (b) Thursday (c) Friday (d) Wednesday
35. 35.4 × 9 =
36. 36.The ages of two twins add up to 16. How old is each twin?
37. 37.Think of 3. Multiply it by 2, then add 4. What number do you end with?
38. 38.306? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
39. 39.2 × ? = 2000
40. 40.Do the 1089 trick with 993: reverse and subtract, then reverse that answer and add. What do you get?

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