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Age and Coin Puzzles Worksheet

Maths tricks trick 14: Age and coin puzzles · Set 711 · 40 questions
TalentJR

The trick (Pretend and adjust): Ages: find each age now, then add (later) or take away (earlier) the same years for everyone. Coins: pretend all coins are ₹1; the extra money tells you how many ₹2 coins there are. Check your answer by putting it back into the riddle.

NameDateTime takenScore ___ / 40
  1. 1.The ages of two twins add up to 12. How old is each twin?
  2. 2.The ages of two twins add up to 26. How old is each twin?
  3. 3.A father is 31 years old and his son is 10. How old was the father when the son was born?
  4. 4.A father is 42 years old and his son is 13. How old was the father when the son was born?
  5. 5.You have 14 coins. Each coin is ₹1 or ₹2, and together they make ₹15. How many ₹2 coins do you have?
  6. 6.A girl is 5 years old and her brother is 2 years older. How old will her brother be in 3 years?
  7. 7.In 5 years a boy will be 16 years old. How old was he 6 years ago?
  8. 8.You have 7 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
  9. 9.You have 9 coins. Each coin is ₹1 or ₹2, and together they make ₹11. How many ₹2 coins do you have?
  10. 10.You have 13 coins. Each coin is ₹1 or ₹2, and together they make ₹16. How many ₹2 coins do you have?
  11. 11.The ages of two twins add up to 22. How old is each twin?
  12. 12.A piggy bank has 11 coins of ₹5 and 14 coins of ₹2. How many rupees are in it?
  13. 13.A girl is 10 years old and her brother is 3 years older. How old will her brother be in 4 years?
  14. 14.In 5 years a boy will be 13 years old. How old was he 2 years ago?
  15. 15.A father is 31 years old and his son is 14. How old was the father when the son was born?
  16. 16.A girl is 9 years old and her brother is 6 years older. How old will her brother be in 3 years?
  17. 17.In 5 years a boy will be 17 years old. How old was he 3 years ago?
  18. 18.A girl is 11 years old and her brother is 6 years older. How old will her brother be in 6 years?
  19. 19.You have 8 coins. Each coin is ₹1 or ₹2, and together they make ₹13. How many ₹2 coins do you have?
  20. 20.A father is 43 years old and his son is 13. How old was the father when the son was born?
  21. 21.A girl is 7 years old and her brother is 5 years older. How old will her brother be in 5 years?
  22. 22.A father is 36 years old and his son is 10. How old was the father when the son was born?
  23. 23.You have 5 coins. Each coin is ₹1 or ₹2, and together they make ₹9. How many ₹2 coins do you have?
  24. 24.In 2 years a boy will be 10 years old. How old was he 3 years ago?
  25. 25.You have 15 coins. Each coin is ₹1 or ₹2, and together they make ₹17. How many ₹2 coins do you have?
  26. 26.The ages of two twins add up to 10. How old is each twin?
  27. 27.A girl is 6 years old and her brother is 3 years older. How old will her brother be in 8 years?
  28. 28.A girl is 11 years old and her brother is 6 years older. How old will her brother be in 9 years?
  29. 29.A piggy bank has 9 coins of ₹5 and 3 coins of ₹2. How many rupees are in it?
  30. 30.A piggy bank has 6 coins of ₹5 and 13 coins of ₹2. How many rupees are in it?
  31. 31.A piggy bank has 9 coins of ₹5 and 9 coins of ₹2. How many rupees are in it?
  32. 32.You have 11 coins. Each coin is ₹1 or ₹2, and together they make ₹14. How many ₹2 coins do you have?
  33. 33.A girl is 7 years old and her brother is 6 years older. How old will her brother be in 6 years?
  34. 34.A girl is 10 years old and her brother is 4 years older. How old will her brother be in 9 years?
  35. 35.A father is 45 years old and his son is 14. How old was the father when the son was born?
  36. 36.The ages of two twins add up to 30. How old is each twin?
  37. 37.A father is 36 years old and his son is 8. How old was the father when the son was born?
  38. 38.You have 8 coins. Each coin is ₹1 or ₹2, and together they make ₹15. How many ₹2 coins do you have?
  39. 39.The ages of two twins add up to 20. How old is each twin?
  40. 40.A father is 33 years old and his son is 13. How old was the father when the son was born?

Answer key

  1. 6
  2. 13
  3. 21
  4. 29
  5. 1
  6. 10
  7. 5
  8. 2
  9. 2
  10. 3
  11. 11
  12. 83
  13. 17
  14. 6
  15. 17
  16. 18
  17. 9
  18. 23
  19. 5
  20. 30
  21. 17
  22. 26
  23. 4
  24. 5
  25. 2
  26. 5
  27. 17
  28. 26
  29. 51
  30. 56
  31. 63
  32. 3
  33. 19
  34. 23
  35. 31
  36. 15
  37. 28
  38. 7
  39. 10
  40. 20

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