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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 94 · 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.If today is Sunday, what day was it 18 days ago? (a) Wednesday (b) Tuesday (c) Thursday (d) Saturday
  2. 2.What comes next? 10, 14, 18, 22, ? (a) 22 (b) 27 (c) 30 (d) 26
  3. 3.A piggy bank has 3 coins of ₹5 and 3 coins of ₹2. How many rupees are in it?
  4. 4.If today is Friday, what day was it 58 days ago? (a) Saturday (b) Tuesday (c) Wednesday (d) Thursday
  5. 5.277 × ? = 2770
  6. 6.9 × 6 = ?4 — what is the missing digit?
  7. 7.1 + 3 + 5 + … + 41 =
  8. 8.13 × 4 =
  9. 9.What comes next? 4, 9, 16, 25, ? (a) 37 (b) 36 (c) 38 (d) 34
  10. 10.7?78 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  11. 11.Magic square (every row, column and diagonal has the same total): 14 16 6 | 4 12 20 | 18 8 ?. What is the missing number?
  12. 12.If today is Sunday, what day will it be after 57 days? (a) Monday (b) Sunday (c) Thursday (d) Tuesday
  13. 13.What comes next? 36, 49, 64, 81, ? (a) 102 (b) 101 (c) 98 (d) 100
  14. 14.297 + 792 =
  15. 15.What comes next? 1, 4, 9, 16, ? (a) 23 (b) 25 (c) 26 (d) 27
  16. 16.I thought of a number, added 5 and then doubled it. I got 26. What was my number?
  17. 17.If today is Tuesday, what day will it be after 90 days? (a) Tuesday (b) Monday (c) Thursday (d) Sunday
  18. 18.A girl is 9 years old and her brother is 4 years older. How old will her brother be in 7 years?
  19. 19.7 × 4 =
  20. 20.Double 48 =
  21. 21.8?80 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  22. 22.40 × 4 =
  23. 23.Magic square (every row, column and diagonal has the same total): 4 3 8 | ? 5 1 | 2 7 6. What is the missing number?
  24. 24.37 × 12 =
  25. 25.4 × 9 =
  26. 26.1 + 2 + 3 + … + 53 =
  27. 27.If today is Monday, what day was it 45 days ago? (a) Saturday (b) Friday (c) Monday (d) Thursday
  28. 28.1 + 3 + 5 + … + 35 =
  29. 29.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  30. 30.If today is Friday, what day will it be after 58 days? (a) Monday (b) Saturday (c) Wednesday (d) Sunday
  31. 31.1 + 2 + 3 + … + 98 =
  32. 32.9 × 5 =
  33. 33.46 × 4 =
  34. 34.Do the 1089 trick with 398: reverse and subtract, then reverse that answer and add. What do you get?
  35. 35.Magic square (every row, column and diagonal has the same total): 27 12 33 | 30 24 18 | ? 36 21. What is the missing number?
  36. 36.17 × ? = 17000
  37. 37.9 × 3 = 2? — what is the missing digit?
  38. 38.What comes next? 16, 25, 36, 49, ? (a) 65 (b) 66 (c) 62 (d) 64
  39. 39.Think of 8. Multiply it by 2, then add 3. What number do you end with?
  40. 40.1 + 2 + 3 + … + 72 =

Answer key

  1. Wednesday
  2. 26
  3. 21
  4. Wednesday
  5. 10
  6. 5
  7. 441
  8. 52
  9. 36
  10. 5
  11. 10
  12. Monday
  13. 100
  14. 1089
  15. 25
  16. 8
  17. Monday
  18. 20
  19. 28
  20. 96
  21. 2
  22. 160
  23. 9
  24. 444
  25. 36
  26. 1431
  27. Friday
  28. 324
  29. 495
  30. Sunday
  31. 4851
  32. 45
  33. 184
  34. 1089
  35. 15
  36. 1000
  37. 7
  38. 64
  39. 19
  40. 2628

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