FACTORIALS!
Factorials are so cool that the notation is: AN EXCLAMATION MARK!!!! The exclamation mark means something very specific in maths. It’s great to be impressed with numbers, but please do not put an exclamation mark
WORD OF THE WEEK: INDEX
INDEX (plural indices): you can see these in expressions like $5^2 = 25$. The 5 is called the BASE, the 2 is called the EXPONENT or INDEX, and the 25 is called a power (in
GEOMETRY PUZZLE: WHAT SHAPE DO YOU SEE?
TRICKY TILINGS:
Tiling stores are like treasure troves of geometrical amusement. Here’s a photo I took yesterday. The puzzle is simply: what shape(s) do you see?
ANSWER: ….
WORD OF THE WEEK: TRIGONOMETRY
TRIGONOMETRY is the branch of maths to do with sin, cos and tan (find them on your calculator). Literally it means “measuring triangles” – so you can use these three functions to find unknown lengths
CURIOUS LOGIC
CURIOUS LOGIC: on one side of a postcard are written the words “the sentence on the other side is true”. You turn over the card to see the words “the sentence on the other side is false”. Which of the two sentences, if either, is the true statement? – Head over to the Blog page to find out the answer.