You are viewing a single comment's thread from:

RE: Maths Brain Teasers 68:: Can you Find What Comes NeXt???

in STEMGeeks2 months ago

Thanks for running these competitions, its great to be a winner of something for once! Here is my go at this weeks quiz

I think the answer is -2
The change from the previous number is +1 , - 2 , +3 , -4 , +5 , -6
In equation form Xn = X(n-1) + (-1)^n* (n-1)
So the seventh number X7 = 4 + -1 * 6 = -2