question_answer

Let\[X=\{n\in N:1\,\,\le \,\,n\le 50\}\]. If \[A=\{n\in X:n\] is a multiple of 2} and \[B=n\in X:n\] is a multiple of 7}, then the number of elements in the smallest subset of X containing both A and B is ________. [JEE MAIN Held on 07-01-2020 Evening]

Answer:

29