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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 627 · 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. 1.11111 × 11111 =
  2. 2.If today is Monday, what day was it 26 days ago? (a) Wednesday (b) Thursday (c) Saturday (d) Tuesday
  3. 3.What comes next? 6, 13, 20, 27, ? (a) 34 (b) 27 (c) 41 (d) 35
  4. 4.8 × 9 =
  5. 5.Half of 58 =
  6. 6.If today is Monday, what day will it be after 11 days? (a) Thursday (b) Saturday (c) Friday (d) Monday
  7. 7.What comes next? 12, 18, 24, 30, ? (a) 30 (b) 37 (c) 42 (d) 36
  8. 8.1 + 3 + 5 + … + 43 =
  9. 9.?37 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  10. 10.I thought of a number, added 1 and then doubled it. I got 20. What was my number?
  11. 11.886 × 10 =
  12. 12.9 × 1 =
  13. 13.9 × 9 =
  14. 14.Double 81 =
  15. 15.Think of 14. Multiply it by 3, then add 3. What number do you end with?
  16. 16.A piggy bank has 6 coins of ₹5 and 4 coins of ₹2. How many rupees are in it?
  17. 17.9 × 5 =
  18. 18.Think of 5. Multiply it by 3, then add 1. What number do you end with?
  19. 19.Magic square (every row, column and diagonal has the same total): 10 8 18 | ? 12 4 | 6 16 14. What is the missing number?
  20. 20.9 × 3 =
  21. 21.37 × 3 =
  22. 22.In 2 years a boy will be 16 years old. How old was he 3 years ago?
  23. 23.111111 × 111111 =
  24. 24.The ages of two twins add up to 14. How old is each twin?
  25. 25.15 × 4 =
  26. 26.39 × 4 =
  27. 27.37 × 18 =
  28. 28.Half of 76 =
  29. 29.606 × ? = 6060
  30. 30.7 × 9 =
  31. 31.495 + 594 =
  32. 32.12345678 × 9 + 9 =
  33. 33.12 × 9 + 3 =
  34. 34.32 × 4 =
  35. 35.Magic square (every row, column and diagonal has the same total): 9 14 7 | 8 10 12 | 13 6 ?. What is the missing number?
  36. 36.123 × 8 + 3 =
  37. 37.Do the 1089 trick with 278: reverse and subtract, then reverse that answer and add. What do you get?
  38. 38.9 × 5 = 4? — what is the missing digit?
  39. 39.Half of 148 =
  40. 40.You have 13 coins. Each coin is ₹1 or ₹2, and together they make ₹24. How many ₹2 coins do you have?

Answer key

  1. 123454321
  2. Wednesday
  3. 34
  4. 72
  5. 29
  6. Friday
  7. 36
  8. 484
  9. 8
  10. 9
  11. 8860
  12. 9
  13. 81
  14. 162
  15. 45
  16. 38
  17. 45
  18. 16
  19. 20
  20. 27
  21. 111
  22. 11
  23. 12345654321
  24. 7
  25. 60
  26. 156
  27. 666
  28. 38
  29. 10
  30. 63
  31. 1089
  32. 111111111
  33. 111
  34. 128
  35. 11
  36. 987
  37. 1089
  38. 5
  39. 74
  40. 11

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