1 1 vote Let both the series $a_{1}, a_{2}, a_{3}, \ldots$ and $b_{1}, b_{2}, b_{3} \ldots$ be in arithmetic progression such that the common differences of both the series are prime numbers. If $a_{5}=b_{9}, a_{19}=b_{19}$ and $b_{2}=0$, then $a_{11}$ equals $79$ $83$ $84$ $86$ Quantitative Aptitude cat2023-set2 quantitative-aptitude arithmetic-progression number-systems + – admin 5.3k points 1.3k views answer comment Share Follow Print 0 reply Please log in or register to add a comment.