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
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840 is the answer mark as brainliest
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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.
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.
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