Question

What is the greatest 6-digit number that is divisible by 15, 24 and 28? A) 999650 b)999600 c)999825 d)999570 answer: b

Answer 1

option b 999600 is correct

Answer 2

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First we take the LCM of 15, 24 and 28
15 = 3 x 5
24 = 2 x 2 x 2 x 3
28 = 2 x 2 x 7

LCM = 2 x 2 x 2 x 3 x 5 x 7
= 840
Now we divide these numbers
a . 999650 / 840 = 1190.05

b. 999600 / 840 = 1190

c. 999825 / 840 = 1190.26

d. 999570 / 840 = 1189.96

Hence
Option B is your answer

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