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 3 of 6.
Ronit said:
8 years ago
Why we take only 8*3=24? why not other?
Shubham said:
8 years ago
@Rohit.
May be we need to consider only co-prime numbers to solve the question and we have already tricks to check if the number is divisible by 3 or 8.
May be we need to consider only co-prime numbers to solve the question and we have already tricks to check if the number is divisible by 3 or 8.
Alli said:
8 years ago
A is also divisible by 24, 3+5+7+1+8.
Sia said:
8 years ago
Why there is a division of 738 only?
Yogi said:
9 years ago
I don't understand the methods. Please anyone tell me the shortcut method for solving this.
Rohit kumar said:
8 years ago
35718 = 3*8=24/24 divisible.
63810= 3*8 = 24 /24 divisible.
537804 = 3*8 = 24 / 24 divisible.
3125736 = 3 available but 8 is not available whose it can make 24, if given in question no is 24 will be not divisible therefore answer is 3125736.
63810= 3*8 = 24 /24 divisible.
537804 = 3*8 = 24 / 24 divisible.
3125736 = 3 available but 8 is not available whose it can make 24, if given in question no is 24 will be not divisible therefore answer is 3125736.
Muthyal said:
7 years ago
What is co-prime?
Kartik said:
7 years ago
24= 6 * 4.
The number is divisible by 4 if the last digit of the number is 4 or 6.
The number is divisible by 6 if the last digit of the number is 6.
Therefore option (D).
The number is divisible by 4 if the last digit of the number is 4 or 6.
The number is divisible by 6 if the last digit of the number is 6.
Therefore option (D).
Ram said:
1 decade ago
It is possible to divide the number by 2x4x3.
Priya said:
2 decades ago
5+4+7+8+0+4=28 is not divisible by 3, it can't by 24 also
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