book Maths Puzzle Numerical Ability

What is the polygon exterior angle sum theorem?

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book Other Question

4-6(3x-1)<5x+2

4-18x+6<5x+2
-5x -5x
4-13x+6<2
-4 -4

-13x+6<-2
-6 -6
-13x<-8
_______
-13x -13x

x=8/13 What will the Earth�s population be in 2025?

P( in billons) = 4 x 2^(y-1975)/35
The U.S. population in 1990 was approximately 250 million, and the average growth rate for the p