CAT 2019

Slot 2

QA

Question & Solution

A: $15, 19, 23, 27, \ldots, 415$

B: $14, 19, 24, 29, \ldots, 464$

Here the first common term = $19$

Common difference = $LCM(5, 4) = 20$

$19 + (n-1)20 \le 415$

$(n-1)20 \le 396$

$(n-1) \le 19.8$

$n=20$