# Consider all three-digit numbers that are greater than the sum of the squares of their digits by exactly 543. What are the last three digits of the sum of these numbers?

Amit Bhatnagar on Quora.com on September 9, 2013

Using Excel, the numbers are: 616, 637, 677 and 696. This sums to 2626. So the answer is 626.
/* I know this approach was not what you were looking for, but can’t resist using Excel when I have a spreadsheet open. đź™‚ */

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## What A/B testing platform does Quora use?

Amit Bhatnagar on Quora.com on November 9, 2012

Someone from Quora can confirm this, but based on what I have observed, I don’t think they are using any third party tool for A/B testing.

I use a tool called Ghostery (browser extension) for this purpose. If the website is using any of the popular third party platforms for web-analytics, tag-management, ad-serving, or A/B testing, Ghostery will be able to detect those. Of course, if you are doing this in-house, it won’t detect anything.

This is what Ghostery detected for Quora:

So, it does not appear that they are using any of the popular third party tools.

Ghostery does detect most third party A/B testing tools, if present:
Optimizely – Analysis by Ghostery
Visual Website Optimiser (Wingify)

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## How can I backup my Quora account?

Amit Bhatnagar on Quora.com on October 29, 2012

I am not aware of any Quora feature that allows you to do this, but I have the RSS feed of my answers synced to my blog (http://amitbhatnagar.com) that achives the same purpose

Here is a sequence of steps that you can follow, if you have a WordPress blog (I am sure there are options available for other platform, but I have tried only WP)

1. Install FeedWordPress plug-in on your WP blog.