When not to choose D?

[user8522]

Hi there!

I have trouble working out when not to choose D.

For example, in the following task I knew that the slope change would result in a bigger decrease along the x-axis than along the y-axis because the slope is steeper than 45 degrees. However, I chose D, because I figured the angles are undeterminable, and the values could be equal. But it is not true of course. Once I used Pythagorean Theorem, it became clear that initially the third side is 17, so the new triangle cannot have sides of equal measure and the angles cannot equal 45-45.

So my question is a general one, do you guys have any interesting processes in place to avoid a mistake like the one I’ve just described?

[HoldMyBeer]

@user8522

So my question is a general one, do you guys have any interesting processes

what seems to help me the most was to have the time to re-do the questions . Maybe you can do a experiment in which you take a big book Quant section and do 30 questions in 20 mins and then using additional 10 mins to re-check your work and then try to compare it what you regularly do and see if its improves your accuracy !

[user8522]

That’s great advice. I’ll try that!

[user8522]

It’s actually incredibly helpful! On the second pass, I tend to notice different things than on the first pass. Though I must say, I find it hard to finish the first pass in 20 minutes. It takes me 25 for now. But I’ll keep trying to improve it! Thanks!