what is the smallest number which when diminished by 24 , is divisible 5 , 10 , 15 and 20 ?
"required number = ( lcm of 5 , 10 , 15 and 20 ) + 24 = 60 + 24 = 84 option b"
add(lcm(lcm(5, 10), lcm(15, 20)), 24)