For the following questions answer them individually
Three of the following four of alphabets and numerals have the same relationship between their elements as in the case of the pair PRIVATE : 8732465 and hence form a group. Which of the following does not belong to the group?
If 12 men and 6 boys can do a work in 4 days and 4 men and 14 boys can do the same work in 8 days, find the ratio of efficiency of a man to that of a boy.