how many multiples of 2 are there between 1 and 54 , exclusive ?
"26 multiples of 2 between 1 and 54 exclusive . from 2 * 1 upto 2 * 26 , ( 1,2 , 3,4 , . . . , 26 ) . hence , 26 multiples ! correct option is d"
add(divide(subtract(54, 1), 2), const_1)