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Aptitude - Numbers - Discussion

Discussion Forum : Numbers - General Questions (Q.No. 106)
Numbers
106.
If x and y are the two digits of the number 653xy such that this number is divisible by 80, then x + y = ?
2 or 6
4
4 or 8
8
None of these
Answer: Option
Explanation:

80 = 2 x 5 x 8

Since 653xy is divisible by 2 and 5 both, so y = 0.

Now, 653x is divisible by 8, so 13x should be divisible by 8.

This happens when x = 6.

x + y = (6 + 0) = 6.

Discussion:
23 comments Page 2 of 3.
Swayze said:   1 decade ago
75 xy is divisible by 5 and 9 how to justify it need your help thanks.
Xyz said:   1 decade ago
65320/80 = 816.5, 65360/80 = 817, so x = 6 & y = 0 => x+y = 6.
Palwasha said:   4 years ago
@All.

Please explain it. I'm unable to understand it.
Vishnu Swamy said:   8 years ago
Excellent explanation, thank you very much @Sangeeta.
Ramesh said:   9 years ago
Nothing, I understand please anyone explain clearly.
Surabhi said:   7 years ago
Pleased explain it. I'm not able to understand this.
Jenet said:   7 years ago
Explained well @Sangeetha. Keep up the good work.
Kawooya Alex said:   2 years ago
What is 13x here?

Please explain me in detail.
(8)
Alif Shaikh said:   3 years ago
I think Only 6 is the correct one.
(6)
Sadhna said:   3 years ago
It should be only 6.
(2)
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