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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 175 · 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. 1.9 × 1000 =
  2. 2.396 + 693 =
  3. 3.111111 × 111111 =
  4. 4.The ages of two twins add up to 10. How old is each twin?
  5. 5.9 × 8 = 7? — what is the missing digit?
  6. 6.50 × 4 =
  7. 7.If today is Thursday, what day will it be after 83 days? (a) Tuesday (b) Wednesday (c) Saturday (d) Thursday
  8. 8.What comes next? 36, 49, 64, 81, ? (a) 101 (b) 102 (c) 98 (d) 100
  9. 9.You have 5 coins. Each coin is ₹1 or ₹2, and together they make ₹7. How many ₹2 coins do you have?
  10. 10.9 × 2 = ?8 — what is the missing digit?
  11. 11.2 × 9 =
  12. 12.12 × 9 + 3 =
  13. 13.891 + 198 =
  14. 14.1 × 9 =
  15. 15.12345679 × 18 =
  16. 16.9 × 6 = ?4 — what is the missing digit?
  17. 17.Take 22 and take away the sum of its digits. What do you get?
  18. 18.1 + 3 + 5 + … + 45 =
  19. 19.I thought of a number, multiplied it by 2 and added 1. I got 31. What was my number?
  20. 20.?106 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  21. 21.If today is Monday, what day was it 9 days ago? (a) Friday (b) Saturday (c) Sunday (d) Tuesday
  22. 22.11 × 11 =
  23. 23.14 × ? = 1400
  24. 24.Magic square (every row, column and diagonal has the same total): 14 29 ? | 11 17 23 | 26 5 20. What is the missing number?
  25. 25.Take 65 and take away the sum of its digits. What do you get?
  26. 26.14 × 4 =
  27. 27.Magic square (every row, column and diagonal has the same total): 17 12 13 | ? 14 18 | 15 16 11. What is the missing number?
  28. 28.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
  29. 29.15 × ? = 1500
  30. 30.Take 70 and take away the sum of its digits. What do you get?
  31. 31.A father is 39 years old and his son is 14. How old was the father when the son was born?
  32. 32.11111 × 11111 =
  33. 33.9 × 4 = ?6 — what is the missing digit?
  34. 34.Magic square (every row, column and diagonal has the same total): ? 8 18 | 20 12 4 | 6 16 14. What is the missing number?
  35. 35.18 × 1000 =
  36. 36.If today is Wednesday, what day will it be after 64 days? (a) Sunday (b) Thursday (c) Wednesday (d) Friday
  37. 37.1 + 3 + 5 + … + 11 =
  38. 38.5?34 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  39. 39.If today is Thursday, what day was it 36 days ago? (a) Tuesday (b) Thursday (c) Saturday (d) Wednesday
  40. 40.931 × 10 =

Answer key

  1. 9000
  2. 1089
  3. 12345654321
  4. 5
  5. 2
  6. 200
  7. Wednesday
  8. 100
  9. 2
  10. 1
  11. 18
  12. 111
  13. 1089
  14. 9
  15. 222222222
  16. 5
  17. 18
  18. 529
  19. 15
  20. 2
  21. Saturday
  22. 121
  23. 100
  24. 8
  25. 54
  26. 56
  27. 10
  28. 1089
  29. 100
  30. 63
  31. 25
  32. 123454321
  33. 3
  34. 10
  35. 18000
  36. Thursday
  37. 36
  38. 6
  39. Wednesday
  40. 9310

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