Aptitude - Numbers - Discussion
Discussion Forum : Numbers - General Questions (Q.No. 21)
21.
Which of the following number is divisible by 24 ?
Answer: Option
Explanation:
24 = 3 x8, where 3 and 8 co-prime.
Clearly, 35718 is not divisible by 8, as 718 is not divisible by 8.
Similarly, 63810 is not divisible by 8 and 537804 is not divisible by 8.
Consider option (D),
Sum of digits = (3 + 1 + 2 + 5 + 7 + 3 + 6) = 27, which is divisible by 3.
Also, 736 is divisible by 8.
3125736 is divisible by (3 x 8), i.e., 24.
Discussion:
56 comments Page 2 of 6.
Sk.Gopinath Siva said:
1 decade ago
A set of numbers which do not have any other common factor other than 1 are called co-prime.
Neha said:
1 decade ago
Why we select only co prime numbers?
Dhruv said:
1 decade ago
5+4+7+8+0+4 is not divisible by 3.
Muni said:
1 decade ago
Simply you can do this in this way:
Let factor of 24=4*6.
So just check whether the last two digits are divided by 4 and 6 both then you'll get the answer easily.
Let factor of 24=4*6.
So just check whether the last two digits are divided by 4 and 6 both then you'll get the answer easily.
Ram said:
1 decade ago
It is possible to divide the number by 2x4x3.
Rafi said:
1 decade ago
3+5+7+1+8 = 24 sum of digit is divisible by 24 then why this not an answer?
Anil said:
1 decade ago
@Rafi ...think dude among four option only one should be divisible by 24.
So 3*8 or 3 into 8..is coprime and then see the divisibility of 3 and 8.
So 3*8 or 3 into 8..is coprime and then see the divisibility of 3 and 8.
Munir baloch said:
10 years ago
3+5+7+1+8=24 also divisible then why not answer?
Sara said:
10 years ago
I don't understand it please clear my doubt.
Raj said:
10 years ago
Could please any one give clear explanation? Just give me the shortcut method.
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