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Age and Coin Puzzles Worksheet

Maths tricks trick 14: Age and coin puzzles · Set 197 · 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.

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

Answer key

  1. 23
  2. 13
  3. 7
  4. 5
  5. 10
  6. 21
  7. 21
  8. 13
  9. 9
  10. 12
  11. 20
  12. 7
  13. 10
  14. 1
  15. 7
  16. 11
  17. 4
  18. 5
  19. 6
  20. 15
  21. 68
  22. 1
  23. 8
  24. 6
  25. 12
  26. 1
  27. 32
  28. 19
  29. 69
  30. 9
  31. 3
  32. 9
  33. 14
  34. 20
  35. 11
  36. 19
  37. 6
  38. 11
  39. 3
  40. 3

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