Every student in a class swims, dances, or does both. Three fifths of the class swim and three fifths dance. Five students both swim and dance. How many students are in the class?
Students attend our lectures, not because the mathematics we teach ‘makes lots of fun’ for us, but because they believe they can learn some essential knowledge from us. And each of our young students has only one life to live. We should therefore be a
H. Behnke
If human invention is the tree bearing juicy fruits, Maths is the root of this tree!