how many multiples of 2 are there between 1 and 56 , exclusive ?
"27 multiples of 2 between 1 and 56 exclusive . from 2 * 1 upto 2 * 27 , ( 1,2 , 3,4 , . . . , 27 ) . hence , 27 multiples ! correct option is c"
add(divide(subtract(56, 1), 2), const_1)