062_JEE Advanced 2018_Let X be the set consisting of the first 2018 terms of the arithmetic

Let X be the set consisting of the first 2018 terms of the arithmetic progression 1, 6, 11, . . . , and Y be the set consisting of the first 2018 terms of the arithmetic progression 9, 16, 23, . . . Then, the number of elements in the set X ∪ Y is

JEE Advanced 2018,iqbal sir iit,