instruction:
Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
question:
Problem: the sum of the ages of 5 children born at the intervals of 3 year each is 60 year. what is the age of the youngest child ?
Options: a. 4 year, b. 6 year, c. 10 year, d. none of these, e. 9 year
answer:
b

question:
Problem: a boat having a length 8 m and breadth 2 m is floating on a lake. the boat sinks by 1 cm when a man gets on it. the mass of the man is :
Options: a. 12 kg, b. 60 kg, c. 72 kg, d. 160 kg, e. none of these
answer:
d

question:
Problem: if the sum of two numbers is 45 and the h. c. f and l. c. m of these numbers are 3 and 100 respectively, then the sum of the reciprocal of the numbers is equal to :
Options: a. 103 / 300, b. 103 / 200, c. 112 / 300, d. 154 / 140, e. 100 / 300
answer:
a