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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 196 · 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 × 10 = ?0 — what is the missing digit?
  2. 2.527? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  3. 3.?798 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  4. 4.9 × 9 =
  5. 5.What comes next? 5, 10, 20, 40, ? (a) 70 (b) 60 (c) 80 (d) 81
  6. 6.?03 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  7. 7.You have 11 coins. Each coin is ₹1 or ₹2, and together they make ₹12. How many ₹2 coins do you have?
  8. 8.60 × 4 =
  9. 9.The 6th of a month is a Friday. What day is the 20th of the same month? (a) Saturday (b) Monday (c) Friday (d) Thursday
  10. 10.46 × ? = 46000
  11. 11.12345679 × 36 =
  12. 12.9 × 2 =
  13. 13.1 + 3 + 5 + … + 23 =
  14. 14.If today is Wednesday, what day was it 29 days ago? (a) Friday (b) Monday (c) Wednesday (d) Tuesday
  15. 15.2 × 9 =
  16. 16.12345678 × 8 + 8 =
  17. 17.If today is Monday, what day was it 43 days ago? (a) Saturday (b) Sunday (c) Wednesday (d) Monday
  18. 18.1 × 9 =
  19. 19.12 × 8 + 2 =
  20. 20.Odd one out: which number is NOT in the 8 times table? (a) 24 (b) 40 (c) 48 (d) 42
  21. 21.34 × 100 =
  22. 22.9 × 4 = 3? — what is the missing digit?
  23. 23.1 + 2 + 3 + … + 10 =
  24. 24.1234 × 9 + 5 =
  25. 25.If today is Sunday, what day will it be after 79 days? (a) Wednesday (b) Tuesday (c) Monday (d) Friday
  26. 26.If today is Sunday, what day was it 38 days ago? (a) Thursday (b) Friday (c) Sunday (d) Wednesday
  27. 27.55 × 4 =
  28. 28.458 × ? = 4580
  29. 29.Magic square (every row, column and diagonal has the same total): ? 16 14 | 20 12 4 | 10 8 18. What is the missing number?
  30. 30.A piggy bank has 10 coins of ₹5 and 5 coins of ₹2. How many rupees are in it?
  31. 31.In 5 years a boy will be 18 years old. How old was he 7 years ago?
  32. 32.2?60 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  33. 33.Take 54 and take away the sum of its digits. What do you get?
  34. 34.A father is 31 years old and his son is 10. How old was the father when the son was born?
  35. 35.Magic trick! Think of 6. Double it, add 16, halve it, then take away 6. What number do you get?
  36. 36.If today is Friday, what day was it 32 days ago? (a) Thursday (b) Monday (c) Sunday (d) Tuesday
  37. 37.Odd one out: which number is NOT in the 6 times table? (a) 24 (b) 48 (c) 36 (d) 32
  38. 38.Take 481. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  39. 39.786? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  40. 40.If today is Sunday, what day will it be after 30 days? (a) Wednesday (b) Monday (c) Tuesday (d) Friday

Answer key

  1. 9
  2. 4
  3. 3
  4. 81
  5. 80
  6. 6
  7. 1
  8. 240
  9. Friday
  10. 1000
  11. 444444444
  12. 18
  13. 144
  14. Tuesday
  15. 18
  16. 98765432
  17. Sunday
  18. 9
  19. 98
  20. 42
  21. 3400
  22. 6
  23. 55
  24. 11111
  25. Tuesday
  26. Thursday
  27. 220
  28. 10
  29. 6
  30. 60
  31. 6
  32. 1
  33. 45
  34. 21
  35. 8
  36. Monday
  37. 32
  38. 297
  39. 6
  40. Tuesday

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