Can you find any two-digit numbers that satisfy all of these statements?
Trinni rearanges numbers on a clock face so each adjacent pair add up to a triangle number... What number did she put where 6 would usually be?
I have forgotten the number of the combination of the lock on my briefcase. I did have a method for remembering it...
Can you find a rule which connects consecutive triangular numbers?
Can you find a rule which relates triangular numbers to square numbers?
Show that all pentagonal numbers are one third of a triangular number.
Watch the video to see how to add together an arithmetic sequence of numbers efficiently.
What would you do if your teacher asked you add all the numbers from 1 to 100? Find out how Carl Gauss responded when he was asked to do just that.
