how many multiples of 2 are there between 1 and 52 , exclusive ?
"25 multiples of 2 between 1 and 52 exclusive . from 2 * 1 upto 2 * 25 , ( 1,2 , 3,4 , . . . , 25 ) . hence , 25 multiples ! correct option is c"
add(divide(subtract(52, 1), 2), const_1)