what is the least number which when divided by 6 , 7 , 9 and 18 leaves remainder 4 in each care ?
"explanation : lcm of 6 , 7 , 9 and 18 is 126 required number = 126 + 4 = 130 answer : option a"
add(lcm(lcm(6, 7), lcm(9, 18)), 4)