Question 23
Mark is 11 years old. Find how many years ago his father’s age was five times Mark’s age in each version:
(a) His father is 33 years old (the source’s English version).
(b) His father is 35 years old (the source’s Vietnamese version).
Enter the two answers in years in order (a),(b), separated by a semicolon. Use a decimal point if needed.
The original English says 33 while the Vietnamese and solution say 35. Both material variants are preserved here. Treat the stated ages as exact ages, allowing fractional years.
(a) His father is 33 years old (the source’s English version).
(b) His father is 35 years old (the source’s Vietnamese version).
Enter the two answers in years in order (a),(b), separated by a semicolon. Use a decimal point if needed.
The original English says 33 while the Vietnamese and solution say 35. Both material variants are preserved here. Treat the stated ages as exact ages, allowing fractional years.