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2 is definitely sufficient since you can add the 3 vertical lines on the left side (=6) and subtract the one on the right to calculate the length of /. But how is 1 sufficient?

If you know the length of red line, through the diagram you can know the length of vertical green line as it is equal to two vertical red lines. this will be same as horizontal green line and hence length of AB can be found. Similarly, if you know the length of green line, you can find length of red line and hence AB

2 is definitely sufficient since you can add the 3 vertical lines on the left side (=6) and subtract the one on the right to calculate the length of /. But how is 1 sufficient?

3R=1G+1R 2R=1G Knowing either R or G gives the answer.

Interested in applying for an MBA? In the fourth and final part of our live QA series with guest expert Chioma Isiadinso, co-founder of consultancy Expartus and former admissions...