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Maths Tricks Practice Worksheet

Maths tricks trick 15: Mixed trick challenge · Set 665 · 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 × 1 =
  2. 2.824 × 10 =
  3. 3.If today is Saturday, what day will it be after 99 days? (a) Sunday (b) Monday (c) Wednesday (d) Saturday
  4. 4.319 × 10 =
  5. 5.Magic square (every row, column and diagonal has the same total): 14 ? 10 | 12 16 20 | 22 8 18. What is the missing number?
  6. 6.The 5th of a month is a Thursday. What day is the 27th of the same month? (a) Saturday (b) Monday (c) Thursday (d) Friday
  7. 7.Magic trick! Think of 18. Double it, add 4, halve it, then take away 18. What number do you get?
  8. 8.What comes next? 1, 4, 9, 16, ? (a) 27 (b) 23 (c) 25 (d) 26
  9. 9.You have 14 coins. Each coin is ₹1 or ₹2, and together they make ₹16. How many ₹2 coins do you have?
  10. 10.Double 26 =
  11. 11.A piggy bank has 11 coins of ₹5 and 9 coins of ₹2. How many rupees are in it?
  12. 12.The 4th of a month is a Saturday. What day is the 12th of the same month? (a) Sunday (b) Saturday (c) Wednesday (d) Monday
  13. 13.You have 9 coins. Each coin is ₹1 or ₹2, and together they make ₹16. How many ₹2 coins do you have?
  14. 14.604? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
  15. 15.What comes next? 17, 22, 27, 32, ? (a) 32 (b) 38 (c) 42 (d) 37
  16. 16.14 × 4 =
  17. 17.1 + 3 + 5 + … + 39 =
  18. 18.18 × 4 =
  19. 19.If today is Saturday, what day will it be after 62 days? (a) Friday (b) Monday (c) Thursday (d) Saturday
  20. 20.11111 × 11111 =
  21. 21.Magic trick! Think of 6. Double it, add 10, halve it, then take away 6. What number do you get?
  22. 22.1 + 3 + 5 + … + 11 =
  23. 23.396 + 693 =
  24. 24.7 × 9 =
  25. 25.940 × ? = 9400
  26. 26.Magic square (every row, column and diagonal has the same total): 6 11 10 | 13 9 5 | ? 7 12. What is the missing number?
  27. 27.A girl is 8 years old and her brother is 5 years older. How old will her brother be in 4 years?
  28. 28.123 × 9 + 4 =
  29. 29.Double 68 =
  30. 30.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  31. 31.44 × 4 =
  32. 32.You have 15 coins. Each coin is ₹1 or ₹2, and together they make ₹27. How many ₹2 coins do you have?
  33. 33.Magic square (every row, column and diagonal has the same total): 24 ? 12 | 9 21 33 | 30 15 18. What is the missing number?
  34. 34.9 × 2 = 1? — what is the missing digit?
  35. 35.If today is Sunday, what day will it be after 35 days? (a) Wednesday (b) Saturday (c) Monday (d) Sunday
  36. 36.A father is 34 years old and his son is 8. How old was the father when the son was born?
  37. 37.If today is Sunday, what day will it be after 32 days? (a) Thursday (b) Wednesday (c) Friday (d) Sunday
  38. 38.198 + 891 =
  39. 39.693 + 396 =
  40. 40.1 + 3 + 5 + … + 49 =

Answer key

  1. 9
  2. 8240
  3. Sunday
  4. 3190
  5. 24
  6. Friday
  7. 2
  8. 25
  9. 2
  10. 52
  11. 73
  12. Sunday
  13. 7
  14. 8
  15. 37
  16. 56
  17. 400
  18. 72
  19. Friday
  20. 123454321
  21. 5
  22. 36
  23. 1089
  24. 63
  25. 10
  26. 8
  27. 17
  28. 1111
  29. 136
  30. 594
  31. 176
  32. 12
  33. 27
  34. 8
  35. Sunday
  36. 26
  37. Thursday
  38. 1089
  39. 1089
  40. 625

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