Hi @carcass.

I wonder why I click on an option (A,B,C,D). The webpage does not indicate whether I'm wrong or correct. It is only after I reload the page that the result comes out. On gmatclub.com, immediately I chose an option, The result comes out.

I suggest that our site use MATHJAX so that we can enter mathematical symbols more easily and quickly.

I would like to suggest that we have an LIVE preview for any comment we are writing, just like that in

https://math.stackexchange.com/. It gives us more control over what we are writing.

Best regards,

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Do not pray for an easy life, pray for the strength to endure a difficult one - Bruce Lee