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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 290 · 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.What comes next? 4, 9, 16, 25, ? (a) 38 (b) 36 (c) 37 (d) 34
  2. 2.Take 97 and take away the sum of its digits. What do you get?
  3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
  4. 4.123456 × 9 + 7 =
  5. 5.8 × 9 =
  6. 6.9 × 7 = 6? — what is the missing digit?
  7. 7.1 + 2 + 3 + … + 61 =
  8. 8.Magic square (every row, column and diagonal has the same total): 2 ? 4 | 7 5 3 | 6 1 8. What is the missing number?
  9. 9.Magic square (every row, column and diagonal has the same total): 21 ? 27 | 24 18 12 | 9 30 15. What is the missing number?
  10. 10.594 + 495 =
  11. 11.The 8th of a month is a Sunday. What day is the 30th of the same month? (a) Monday (b) Tuesday (c) Thursday (d) Sunday
  12. 12.9 × 2 = 1? — what is the missing digit?
  13. 13.Magic square (every row, column and diagonal has the same total): 22 8 18 | 12 16 ? | 14 24 10. What is the missing number?
  14. 14.Magic trick! Think of 16. Double it, add 12, halve it, then take away 16. What number do you get?
  15. 15.The 2nd of a month is a Saturday. What day is the 25th of the same month? (a) Monday (b) Tuesday (c) Sunday (d) Thursday
  16. 16.?003 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  17. 17.9 × 10 = 9? — what is the missing digit?
  18. 18.A father is 36 years old and his son is 8. How old was the father when the son was born?
  19. 19.You have 6 coins. Each coin is ₹1 or ₹2, and together they make ₹11. How many ₹2 coins do you have?
  20. 20.A piggy bank has 9 coins of ₹5 and 13 coins of ₹2. How many rupees are in it?
  21. 21.I thought of a number, added 4 and then doubled it. I got 18. What was my number?
  22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
  23. 23.Take 28 and take away the sum of its digits. What do you get?
  24. 24.Magic square (every row, column and diagonal has the same total): 8 23 20 | 29 17 5 | 14 11 ?. What is the missing number?
  25. 25.?803 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  26. 26.19 × 4 =
  27. 27.14?2 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  28. 28.If today is Thursday, what day will it be after 24 days? (a) Monday (b) Wednesday (c) Saturday (d) Sunday
  29. 29.872 × ? = 8720
  30. 30.Half of 122 =
  31. 31.Magic square (every row, column and diagonal has the same total): ? 11 4 | 5 7 9 | 10 3 8. What is the missing number?
  32. 32.In 2 years a boy will be 14 years old. How old was he 6 years ago?
  33. 33.Magic square (every row, column and diagonal has the same total): 31 16 19 | 10 22 ? | 25 28 13. What is the missing number?
  34. 34.If today is Wednesday, what day was it 24 days ago? (a) Sunday (b) Wednesday (c) Monday (d) Saturday
  35. 35.1 + 2 + 3 + … + 69 =
  36. 36.42 × 1000 =
  37. 37.693 + 396 =
  38. 38.9 × 2 =
  39. 39.1 + 3 + 5 + … + 25 =
  40. 40.9 × 3 =

Answer key

  1. 36
  2. 81
  3. 693
  4. 1111111
  5. 72
  6. 3
  7. 1891
  8. 9
  9. 6
  10. 1089
  11. Monday
  12. 8
  13. 20
  14. 6
  15. Monday
  16. 6
  17. 0
  18. 28
  19. 5
  20. 71
  21. 5
  22. 396
  23. 18
  24. 26
  25. 7
  26. 76
  27. 2
  28. Sunday
  29. 10
  30. 61
  31. 6
  32. 6
  33. 34
  34. Sunday
  35. 2415
  36. 42000
  37. 1089
  38. 18
  39. 169
  40. 27

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