Question

Find the smallest number that is divisible by all even numbers 5 and 15 is ? Options are a)850 b)680 c)840 d)650

Answer 1

840 is the answer mark as brainliest

Answer 2

840 according to given option :

divisible by 5 due to unit digit of 840 is 0(zero).

840 is also an even number.

divisble by 15=5 ✖ 3

we know 840 divisble by 5.

for divisible by 3: 8+4+0=12 sum of digit divisible by 3.

so 840 is divisible by both 5 and 3 so it also divisible by 15.