If you ask a child what they think the biggest number in the world is, they’ll probably enthusiastically yell “one hundred!” Now what if you tell them they can add one to that? “Hmm… I think the biggest number is 1000 then!” Then you tell them they can add one to that. This can go on for a very long time, until the child realises that this can go on forever. They can keep adding one to the new big number, no matter how huge it is. That’s infinity! However, infinity is not a n

Calculus seems like a mélange of complicated symbols when you first encounter it. However, behind the cryptic letters and symbols lies a simple idea: change . Differential calculus This is the branch of calculus which is often taught first. It can help find the gradient of a graph- even a curved one- with accuracy, but what does the gradient mean in the first place? You may already know that gradient is calculated by the change in the y value divided by the change in the x va

Traditional that we start with a Hello World