four bells commence tolling together and toll at intervals of 2 , 4 , 6 , 8 seconds respectively . in 18 minutes , how many times do they toll together ?
"lcm of 2 , 4 , 6 , 8 is 24 . so , after each 24 seconds , they would toll together . hence , in 18 minutes , they would toll 18 * 60 seconds / 24 seconds = 45 times but then the question says they commence tolling together . so , they basically also toll at thebeginning ( 0 second ) . so , total tolls together = 45 + 1 = 46 answer c"
divide(18, divide(multiply(multiply(2, multiply(multiply(add(2, const_3), 2), const_3)), 2), 18))