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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 164 · 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. 1.2?38 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  2. 2.4?21 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  3. 3.Magic square (every row, column and diagonal has the same total): ? 23 8 | 5 17 29 | 26 11 14. What is the missing number?
  4. 4.Half of 154 =
  5. 5.26 × 4 =
  6. 6.What comes next? 1, 4, 9, 16, ? (a) 25 (b) 26 (c) 27 (d) 23
  7. 7.1234 × 8 + 4 =
  8. 8.Magic trick! Think of 9. Double it, add 14, halve it, then take away 9. What number do you get?
  9. 9.9 × 10 = 9? — what is the missing digit?
  10. 10.12345679 × 36 =
  11. 11.Double 38 =
  12. 12.37 × 21 =
  13. 13.33 × 4 =
  14. 14.A father is 36 years old and his son is 6. How old was the father when the son was born?
  15. 15.3 × 9 =
  16. 16.116 × ? = 1160
  17. 17.Magic square (every row, column and diagonal has the same total): 10 25 22 | 31 19 7 | 16 13 ?. What is the missing number?
  18. 18.The 9th of a month is a Monday. What day is the 24th of the same month? (a) Friday (b) Monday (c) Wednesday (d) Tuesday
  19. 19.9 × 3 = ?7 — what is the missing digit?
  20. 20.307? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  21. 21.I thought of a number, multiplied it by 4 and added 2. I got 50. What was my number?
  22. 22.I thought of a number, multiplied it by 3 and added 9. I got 51. What was my number?
  23. 23.A piggy bank has 12 coins of ₹5 and 12 coins of ₹2. How many rupees are in it?
  24. 24.The ages of two twins add up to 24. How old is each twin?
  25. 25.Think of 8. Multiply it by 5, then add 8. What number do you end with?
  26. 26.What comes next? 14, 17, 20, 23, ? (a) 29 (b) 27 (c) 23 (d) 26
  27. 27.1 + 3 + 5 + … + 9 =
  28. 28.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
  29. 29.If today is Saturday, what day was it 59 days ago? (a) Thursday (b) Tuesday (c) Saturday (d) Wednesday
  30. 30.22?7 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  31. 31.Double 44 =
  32. 32.12345679 × 63 =
  33. 33.Magic square (every row, column and diagonal has the same total): 24 10 20 | 14 18 22 | 16 26 ?. What is the missing number?
  34. 34.Take 15 and take away the sum of its digits. What do you get?
  35. 35.The 1st of a month is a Tuesday. What day is the 30th of the same month? (a) Saturday (b) Thursday (c) Wednesday (d) Tuesday
  36. 36.I thought of a number, added 6 and then doubled it. I got 52. What was my number?
  37. 37.Odd one out: which number is NOT in the 7 times table? (a) 28 (b) 42 (c) 59 (d) 35
  38. 38.39 × 1000 =
  39. 39.What comes next? 9, 16, 25, 36, ? (a) 47 (b) 51 (c) 50 (d) 49
  40. 40.Magic square (every row, column and diagonal has the same total): 23 ? 29 | 26 20 14 | 11 32 17. What is the missing number?

Answer key

  1. 5
  2. 2
  3. 20
  4. 77
  5. 104
  6. 25
  7. 9876
  8. 7
  9. 0
  10. 444444444
  11. 76
  12. 777
  13. 132
  14. 30
  15. 27
  16. 10
  17. 28
  18. Tuesday
  19. 2
  20. 8
  21. 12
  22. 14
  23. 84
  24. 12
  25. 48
  26. 26
  27. 25
  28. 1089
  29. Wednesday
  30. 7
  31. 88
  32. 777777777
  33. 12
  34. 9
  35. Wednesday
  36. 20
  37. 59
  38. 39000
  39. 49
  40. 8

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