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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 869 · 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.Half of 168 =
  2. 2.Magic trick! Think of 18. Double it, add 12, halve it, then take away 18. What number do you get?
  3. 3.Double 28 =
  4. 4.You have 14 coins. Each coin is ₹1 or ₹2, and together they make ₹18. How many ₹2 coins do you have?
  5. 5.Half of 52 =
  6. 6.9 × 6 = ?4 — what is the missing digit?
  7. 7.38 × 4 =
  8. 8.41 × 4 =
  9. 9.585 × ? = 5850
  10. 10.44 × 4 =
  11. 11.56?5 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  12. 12.If today is Sunday, what day will it be after 70 days? (a) Saturday (b) Sunday (c) Monday (d) Wednesday
  13. 13.16 × 4 =
  14. 14.If today is Monday, what day will it be after 49 days? (a) Thursday (b) Sunday (c) Tuesday (d) Monday
  15. 15.11 × 4 =
  16. 16.1 + 3 + 5 + … + 15 =
  17. 17.The 5th of a month is a Monday. What day is the 21st of the same month? (a) Saturday (b) Tuesday (c) Wednesday (d) Thursday
  18. 18.25 × 1000 =
  19. 19.Take 90 and take away the sum of its digits. What do you get?
  20. 20.29 × 4 =
  21. 21.1 + 2 + 3 + … + 82 =
  22. 22.Think of 8. Multiply it by 3, then add 1. What number do you end with?
  23. 23.Think of 6. Multiply it by 5, then add 7. What number do you end with?
  24. 24.You have 8 coins. Each coin is ₹1 or ₹2, and together they make ₹15. How many ₹2 coins do you have?
  25. 25.Magic square (every row, column and diagonal has the same total): 11 26 23 | 32 20 ? | 17 14 29. What is the missing number?
  26. 26.9 × 5 = ?5 — what is the missing digit?
  27. 27.1 + 2 + 3 + … + 74 =
  28. 28.The 6th of a month is a Wednesday. What day is the 17th of the same month? (a) Saturday (b) Monday (c) Wednesday (d) Sunday
  29. 29.A piggy bank has 9 coins of ₹5 and 10 coins of ₹2. How many rupees are in it?
  30. 30.Half of 64 =
  31. 31.9 × 4 = 3? — what is the missing digit?
  32. 32.?698 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  33. 33.Magic square (every row, column and diagonal has the same total): 17 32 11 | ? 20 26 | 29 8 23. What is the missing number?
  34. 34.A piggy bank has 6 coins of ₹5 and 5 coins of ₹2. How many rupees are in it?
  35. 35.123 × 8 + 3 =
  36. 36.12 × 9 + 3 =
  37. 37.If today is Saturday, what day was it 36 days ago? (a) Monday (b) Friday (c) Thursday (d) Saturday
  38. 38.Magic square (every row, column and diagonal has the same total): 11 16 9 | 10 12 14 | 15 8 ?. What is the missing number?
  39. 39.1 + 2 + 3 + … + 70 =
  40. 40.13 × ? = 1300

Answer key

  1. 84
  2. 6
  3. 56
  4. 4
  5. 26
  6. 5
  7. 152
  8. 164
  9. 10
  10. 176
  11. 2
  12. Sunday
  13. 64
  14. Monday
  15. 44
  16. 64
  17. Wednesday
  18. 25000
  19. 81
  20. 116
  21. 3403
  22. 25
  23. 37
  24. 7
  25. 8
  26. 4
  27. 2775
  28. Sunday
  29. 65
  30. 32
  31. 6
  32. 4
  33. 14
  34. 40
  35. 987
  36. 111
  37. Friday
  38. 13
  39. 2485
  40. 100

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