instruction:
In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
question:
Problem: jacob is 39 years old . he is 3 times as old as his brother . how old will jacob be when he is twice as old ? 
Options: a ) 63 , b ) 64 , c ) 65 , d ) 76 , e ) 67
answer:
c


question:
Problem: how many halves are there in 9 - fourth ? 
Options: a ) 8 , b ) 4.5 , c ) 3.2 , d ) 7 , e ) 3
answer:
b


question:
Problem: how many 3 digit number formed by using 23 , 45 , 67 once such that number is divisible by 15 . 
Options: a ) 8 , b ) 13 , c ) 12 , d ) 20 , e ) 22
answer:

a