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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 795 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.What comes next? 10, 17, 24, 31, ? (a) 38 (b) 31 (c) 45 (d) 39
  2. 2.Half of 192 =
  3. 3.90 × ? = 9000
  4. 4.1 + 3 + 5 + … + 23 =
  5. 5.Take 81 and take away the sum of its digits. What do you get?
  6. 6.1 + 3 + 5 + … + 41 =
  7. 7.48 × 4 =
  8. 8.Odd one out: which number is NOT in the 8 times table? (a) 40 (b) 34 (c) 64 (d) 32
  9. 9.If today is Thursday, what day was it 40 days ago? (a) Tuesday (b) Sunday (c) Saturday (d) Friday
  10. 10.I thought of a number, added 3 and then doubled it. I got 40. What was my number?
  11. 11.123 × 9 + 4 =
  12. 12.792 + 297 =
  13. 13.Odd one out: which number is NOT in the 4 times table? (a) 28 (b) 40 (c) 16 (d) 11
  14. 14.9 × 9 = 8? — what is the missing digit?
  15. 15.18 × 4 =
  16. 16.1234 × 9 + 5 =
  17. 17.25 × 4 =
  18. 18.1 + 3 + 5 + … + 11 =
  19. 19.37 × 9 =
  20. 20.Odd one out: which number is NOT in the 3 times table? (a) 7 (b) 24 (c) 12 (d) 21
  21. 21.396 + 693 =
  22. 22.What comes next? 16, 25, 36, 49, ? (a) 66 (b) 65 (c) 64 (d) 62
  23. 23.If today is Sunday, what day will it be after 71 days? (a) Sunday (b) Monday (c) Tuesday (d) Thursday
  24. 24.If today is Tuesday, what day will it be after 39 days? (a) Tuesday (b) Friday (c) Sunday (d) Saturday
  25. 25.16?4 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  26. 26.What comes next? 20, 28, 36, 44, ? (a) 53 (b) 44 (c) 60 (d) 52
  27. 27.In 5 years a boy will be 14 years old. How old was he 4 years ago?
  28. 28.If today is Sunday, what day was it 60 days ago? (a) Saturday (b) Wednesday (c) Thursday (d) Tuesday
  29. 29.Double 75 =
  30. 30.Double 61 =
  31. 31.13?3 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  32. 32.1 + 2 + 3 + … + 55 =
  33. 33.Odd one out: which number is NOT in the 3 times table? (a) 10 (b) 12 (c) 6 (d) 18
  34. 34.Half of 28 =
  35. 35.55 × 4 =
  36. 36.Magic square (every row, column and diagonal has the same total): 13 ? 17 | 18 14 10 | 11 16 15. What is the missing number?
  37. 37.969 × 10 =
  38. 38.A piggy bank has 8 coins of ₹5 and 9 coins of ₹2. How many rupees are in it?
  39. 39.15 × 1000 =
  40. 40.9 × 9 =

Answer key

  1. 38
  2. 96
  3. 100
  4. 144
  5. 72
  6. 441
  7. 192
  8. 34
  9. Saturday
  10. 17
  11. 1111
  12. 1089
  13. 11
  14. 1
  15. 72
  16. 11111
  17. 100
  18. 36
  19. 333
  20. 7
  21. 1089
  22. 64
  23. Monday
  24. Saturday
  25. 7
  26. 52
  27. 5
  28. Wednesday
  29. 150
  30. 122
  31. 2
  32. 1540
  33. 10
  34. 14
  35. 220
  36. 12
  37. 9690
  38. 58
  39. 15000
  40. 81

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