Today I met my high school mathematics teacher and he asked for directions to Barclays Bank.
So I remembered how he used to tell us that without mathematics we would end nowhere in life!
So I told him;
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"Sir make a 270 degrees turn, take a straight transect for about 1.8 metre ( you may round that up to the nearest tens), take an offset of 45 degrees protracted from the normal or the geographic north, you will then see a shop which is perpendicular to the horizontal, approximately 300 metres high , make an obtuse angle turn to your left and you will see another building with a green roof truncated at 90 degrees the Zenith. Within that quadrant, and using Pythagoras' Theorem, you will be able to find the bank at a radius of about the logarithm of 7 raised to the power two, in metres (take pi to be = 3.14). 
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The ex teacher fainted...
I made sure he felt what I used to feel like as a pupil in his math class at high school back in the days!