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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 165 · 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.In 3 years a boy will be 13 years old. How old was he 7 years ago?
  2. 2.Magic square (every row, column and diagonal has the same total): 24 ? 12 | 3 15 27 | 18 21 6. What is the missing number?
  3. 3.54 × 4 =
  4. 4.The ages of two twins add up to 22. How old is each twin?
  5. 5.9 × 5 = 4? — what is the missing digit?
  6. 6.9 × 10 =
  7. 7.9 × 2 = 1? — what is the missing digit?
  8. 8.1 + 2 + 3 + … + 27 =
  9. 9.9 × 5 = ?5 — what is the missing digit?
  10. 10.The ages of two twins add up to 16. How old is each twin?
  11. 11.Magic square (every row, column and diagonal has the same total): 12 26 16 | 22 18 14 | 20 ? 24. What is the missing number?
  12. 12.1 + 2 + 3 + … + 96 =
  13. 13.46 × 4 =
  14. 14.Half of 176 =
  15. 15.I thought of a number, multiplied it by 4 and added 7. I got 15. What was my number?
  16. 16.Double 53 =
  17. 17.3 × 9 =
  18. 18.2?03 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  19. 19.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹13. How many ₹2 coins do you have?
  20. 20.Half of 116 =
  21. 21.A father is 44 years old and his son is 7. How old was the father when the son was born?
  22. 22.95 × ? = 9500
  23. 23.1 + 2 + 3 + … + 80 =
  24. 24.A piggy bank has 10 coins of ₹5 and 7 coins of ₹2. How many rupees are in it?
  25. 25.8 × 100 =
  26. 26.The 1st of a month is a Thursday. What day is the 25th of the same month? (a) Saturday (b) Monday (c) Wednesday (d) Sunday
  27. 27.1 + 2 + 3 + … + 88 =
  28. 28.If today is Thursday, what day was it 38 days ago? (a) Monday (b) Thursday (c) Sunday (d) Tuesday
  29. 29.1 + 3 + 5 + … + 19 =
  30. 30.Magic square (every row, column and diagonal has the same total): 6 11 4 | 5 7 9 | 10 ? 8. What is the missing number?
  31. 31.Odd one out: which number is NOT in the 3 times table? (a) 12 (b) 18 (c) 24 (d) 26
  32. 32.12345679 × 81 =
  33. 33.If today is Wednesday, what day was it 16 days ago? (a) Sunday (b) Tuesday (c) Monday (d) Thursday
  34. 34.Half of 112 =
  35. 35.In 3 years a boy will be 13 years old. How old was he 6 years ago?
  36. 36.The 3rd of a month is a Friday. What day is the 24th of the same month? (a) Saturday (b) Monday (c) Thursday (d) Friday
  37. 37.9 × 9 =
  38. 38.Half of 16 =
  39. 39.Magic square (every row, column and diagonal has the same total): 12 33 18 | 27 21 15 | ? 9 30. What is the missing number?
  40. 40.Double 94 =

Answer key

  1. 3
  2. 9
  3. 216
  4. 11
  5. 5
  6. 90
  7. 8
  8. 378
  9. 4
  10. 8
  11. 10
  12. 4656
  13. 184
  14. 88
  15. 2
  16. 106
  17. 27
  18. 4
  19. 1
  20. 58
  21. 37
  22. 100
  23. 3240
  24. 64
  25. 800
  26. Sunday
  27. 3916
  28. Monday
  29. 100
  30. 3
  31. 26
  32. 999999999
  33. Monday
  34. 56
  35. 4
  36. Friday
  37. 81
  38. 8
  39. 24
  40. 188

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