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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 840 · 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.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹10. How many ₹2 coins do you have?
  2. 2.Odd one out: which number is NOT in the 6 times table? (a) 34 (b) 30 (c) 12 (d) 36
  3. 3.9 × 9 = 8? — what is the missing digit?
  4. 4.Half of 122 =
  5. 5.38 × 4 =
  6. 6.36 × 4 =
  7. 7.11 × 4 =
  8. 8.2?98 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  9. 9.9 × 3 =
  10. 10.Magic square (every row, column and diagonal has the same total): 11 32 17 | 26 20 ? | 23 8 29. What is the missing number?
  11. 11.Think of 3. Multiply it by 3, then add 6. What number do you end with?
  12. 12.The ages of two twins add up to 14. How old is each twin?
  13. 13.Half of 68 =
  14. 14.The ages of two twins add up to 18. How old is each twin?
  15. 15.Think of 8. Multiply it by 3, then add 2. What number do you end with?
  16. 16.13 × 100 =
  17. 17.Odd one out: which number is NOT in the 5 times table? (a) 10 (b) 15 (c) 12 (d) 30
  18. 18.9 × 8 =
  19. 19.A girl is 5 years old and her brother is 2 years older. How old will her brother be in 9 years?
  20. 20.1 + 2 + 3 + … + 11 =
  21. 21.1 + 3 + 5 + … + 11 =
  22. 22.23 × 4 =
  23. 23.Double 31 =
  24. 24.9 × 8 = 7? — what is the missing digit?
  25. 25.111 × 111 =
  26. 26.9 × 10 = ?0 — what is the missing digit?
  27. 27.9 × 10 =
  28. 28.The 2nd of a month is a Tuesday. What day is the 21st of the same month? (a) Saturday (b) Monday (c) Wednesday (d) Sunday
  29. 29.51 × 4 =
  30. 30.A piggy bank has 10 coins of ₹5 and 10 coins of ₹2. How many rupees are in it?
  31. 31.9 × 3 = 2? — what is the missing digit?
  32. 32.If today is Sunday, what day was it 45 days ago? (a) Sunday (b) Wednesday (c) Friday (d) Thursday
  33. 33.Magic square (every row, column and diagonal has the same total): ? 24 9 | 6 18 30 | 27 12 15. What is the missing number?
  34. 34.?555 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  35. 35.1 × 9 =
  36. 36.If today is Sunday, what day was it 23 days ago? (a) Thursday (b) Saturday (c) Friday (d) Monday
  37. 37.9 × 9 = ?1 — what is the missing digit?
  38. 38.9 × 2 = ?8 — what is the missing digit?
  39. 39.9 × 4 =
  40. 40.12345679 × 81 =

Answer key

  1. 3
  2. 34
  3. 1
  4. 61
  5. 152
  6. 144
  7. 44
  8. 8
  9. 27
  10. 14
  11. 15
  12. 7
  13. 34
  14. 9
  15. 26
  16. 1300
  17. 12
  18. 72
  19. 16
  20. 66
  21. 36
  22. 92
  23. 62
  24. 2
  25. 12321
  26. 9
  27. 90
  28. Sunday
  29. 204
  30. 70
  31. 7
  32. Thursday
  33. 21
  34. 3
  35. 9
  36. Friday
  37. 8
  38. 1
  39. 36
  40. 999999999

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