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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 549 · 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.Magic square (every row, column and diagonal has the same total): 10 8 ? | 20 12 4 | 6 16 14. What is the missing number?
  2. 2.17?7 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  3. 3.If today is Monday, what day will it be after 82 days? (a) Sunday (b) Friday (c) Saturday (d) Tuesday
  4. 4.Magic square (every row, column and diagonal has the same total): 15 10 ? | 8 12 16 | 13 14 9. What is the missing number?
  5. 5.10 × 1000 =
  6. 6.Take 36 and take away the sum of its digits. What do you get?
  7. 7.9 × 1 =
  8. 8.101 × 10 =
  9. 9.Odd one out: which number is NOT in the 4 times table? (a) 24 (b) 8 (c) 12 (d) 18
  10. 10.120 × ? = 1200
  11. 11.Magic square (every row, column and diagonal has the same total): 14 ? 22 | 24 16 8 | 10 20 18. What is the missing number?
  12. 12.Double 78 =
  13. 13.9 × 9 = 8? — what is the missing digit?
  14. 14.Magic square (every row, column and diagonal has the same total): ? 9 24 | 15 21 27 | 18 33 12. What is the missing number?
  15. 15.You have 12 coins. Each coin is ₹1 or ₹2, and together they make ₹19. How many ₹2 coins do you have?
  16. 16.A piggy bank has 10 coins of ₹5 and 8 coins of ₹2. How many rupees are in it?
  17. 17.11 × 11 =
  18. 18.What comes next? 4, 9, 16, 25, ? (a) 36 (b) 34 (c) 37 (d) 38
  19. 19.Take 33 and take away the sum of its digits. What do you get?
  20. 20.The 4th of a month is a Sunday. What day is the 19th of the same month? (a) Sunday (b) Tuesday (c) Thursday (d) Monday
  21. 21.9 × 6 =
  22. 22.If today is Saturday, what day was it 15 days ago? (a) Monday (b) Friday (c) Saturday (d) Thursday
  23. 23.?224 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  24. 24.Magic square (every row, column and diagonal has the same total): 17 32 11 | 14 20 ? | 29 8 23. What is the missing number?
  25. 25.Odd one out: which number is NOT in the 5 times table? (a) 30 (b) 42 (c) 25 (d) 15
  26. 26.12 × 1000 =
  27. 27.1 + 3 + 5 + … + 25 =
  28. 28.9 × 8 = ?2 — what is the missing digit?
  29. 29.What comes next? 20, 28, 36, 44, ? (a) 52 (b) 60 (c) 53 (d) 44
  30. 30.9 × 10 =
  31. 31.1 + 2 + 3 + … + 9 =
  32. 32.9 × 5 =
  33. 33.Double 89 =
  34. 34.9 × 8 = 7? — what is the missing digit?
  35. 35.The 3rd of a month is a Thursday. What day is the 19th of the same month? (a) Friday (b) Tuesday (c) Saturday (d) Sunday
  36. 36.Magic trick! Think of 20. Double it, add 6, halve it, then take away 20. What number do you get?
  37. 37.Double 37 =
  38. 38.?247 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  39. 39.Magic square (every row, column and diagonal has the same total): 21 6 27 | ? 18 12 | 9 30 15. What is the missing number?
  40. 40.998 × ? = 9980

Answer key

  1. 18
  2. 3
  3. Saturday
  4. 11
  5. 10000
  6. 27
  7. 9
  8. 1010
  9. 18
  10. 10
  11. 12
  12. 156
  13. 1
  14. 30
  15. 7
  16. 66
  17. 121
  18. 36
  19. 27
  20. Monday
  21. 54
  22. Friday
  23. 1
  24. 26
  25. 42
  26. 12000
  27. 169
  28. 7
  29. 52
  30. 90
  31. 45
  32. 45
  33. 178
  34. 2
  35. Saturday
  36. 3
  37. 74
  38. 5
  39. 24
  40. 10

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