Aptitude - Numbers - Discussion

Discussion Forum : Numbers - General Questions (Q.No. 106)
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 3 of 3.

Sadhna said:   3 years ago
It should be only 6.
(2)

Alif Shaikh said:   3 years ago
I think Only 6 is the correct one.
(6)

Kawooya Alex said:   2 years ago
What is 13x here?

Please explain me in detail.
(8)


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