Basic Mathematics

Basic Mathematics Warmups

Pyramid Counting Warmup

         

How many circles are in the final group?

Using the pattern above as an aid, evaluate the sum:

1+2+3+4+5+4+3+2+1 1 + 2 + 3 + 4 + 5 + 4 + 3 + 2 + 1

Based on the previous question, evaluate:

1+2+3++8+9+8++3+2+1. 1 + 2 + 3 + \dots + 8 + 9 + 8 + \dots + 3 + 2 + 1.

From what you have learnt, which expression represents the sum

1+2+3++(n1)+n+(n1)++3+2+1? 1 + 2 + 3 + \dots + (n-1) + n + (n-1) + \dots + 3 + 2 + 1 ?

Hence or otherwise, what is the value of the expression:

1+2+3++49+50+49++3+2+1? 1 + 2 + 3 + \dots + 49 + 50 + 49 + \dots + 3 + 2 + 1?

×

Problem Loading...

Note Loading...

Set Loading...