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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 872 · 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.The 4th of a month is a Monday. What day is the 21st of the same month? (a) Friday (b) Thursday (c) Wednesday (d) Sunday
  2. 2.I thought of a number, multiplied it by 3 and added 5. I got 32. What was my number?
  3. 3.The ages of two twins add up to 22. How old is each twin?
  4. 4.7 × 4 =
  5. 5.A father is 44 years old and his son is 11. How old was the father when the son was born?
  6. 6.?754 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  7. 7.9 × 9 =
  8. 8.A father is 33 years old and his son is 8. How old was the father when the son was born?
  9. 9.I thought of a number, added 6 and then doubled it. I got 18. What was my number?
  10. 10.I thought of a number, added 4 and then doubled it. I got 22. What was my number?
  11. 11.9 × 6 = ?4 — what is the missing digit?
  12. 12.Odd one out: which number is NOT in the 4 times table? (a) 20 (b) 27 (c) 12 (d) 16
  13. 13.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹23. How many ₹2 coins do you have?
  14. 14.The 5th of a month is a Wednesday. What day is the 29th of the same month? (a) Sunday (b) Saturday (c) Friday (d) Tuesday
  15. 15.11 × 11 =
  16. 16.Double 26 =
  17. 17.2 × 9 =
  18. 18.750 × ? = 7500
  19. 19.Double 15 =
  20. 20.What comes next? 1, 2, 4, 8, ? (a) 14 (b) 17 (c) 12 (d) 16
  21. 21.30 × 100 =
  22. 22.24 × 4 =
  23. 23.What comes next? 3, 5, 7, 9, ? (a) 13 (b) 12 (c) 11 (d) 9
  24. 24.87?4 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  25. 25.37 × 1000 =
  26. 26.Take 40 and take away the sum of its digits. What do you get?
  27. 27.22 × 4 =
  28. 28.6?91 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  29. 29.1 + 3 + 5 + … + 17 =
  30. 30.16 × 4 =
  31. 31.Do the 1089 trick with 391: reverse and subtract, then reverse that answer and add. What do you get?
  32. 32.9 × 6 =
  33. 33.Double 52 =
  34. 34.123456789 × 8 + 9 =
  35. 35.40 × 4 =
  36. 36.What comes next? 3, 10, 17, 24, ? (a) 38 (b) 24 (c) 31 (d) 32
  37. 37.Odd one out: which number is NOT in the 6 times table? (a) 30 (b) 55 (c) 24 (d) 36
  38. 38.7 × 100 =
  39. 39.Magic square (every row, column and diagonal has the same total): 6 21 18 | 27 15 ? | 12 9 24. What is the missing number?
  40. 40.56 × 4 =

Answer key

  1. Thursday
  2. 9
  3. 11
  4. 28
  5. 33
  6. 2
  7. 81
  8. 25
  9. 3
  10. 7
  11. 5
  12. 27
  13. 11
  14. Saturday
  15. 121
  16. 52
  17. 18
  18. 10
  19. 30
  20. 16
  21. 3000
  22. 96
  23. 11
  24. 8
  25. 37000
  26. 36
  27. 88
  28. 2
  29. 81
  30. 64
  31. 1089
  32. 54
  33. 104
  34. 987654321
  35. 160
  36. 31
  37. 55
  38. 700
  39. 3
  40. 224

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