Difference between revisions of "AMC 12C 2020"

(Problem 2)
(Problem 2)
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How many increasing subsets of <math>{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}}</math> contain no <math>2</math> consecutive prime numbers?
 
How many increasing subsets of <math>{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}}</math> contain no <math>2</math> consecutive prime numbers?
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==Problem 3==
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A field is on the real <math>xy</math> plane in the shape of a circle, centered at <math>(5, 6)</math> with a a radius of <math>8</math>. The area that is in the field but above the line <math>y = x</math> is planted. What fraction of the field is planted?

Revision as of 12:18, 20 April 2020


Problem 1

What is the sum of the solutions to the equation $(x + 5)(x + 4) - (x + 5)(x - 6) = 100$?


Problem 2

How many increasing subsets of ${{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}}$ contain no $2$ consecutive prime numbers?


Problem 3

A field is on the real $xy$ plane in the shape of a circle, centered at $(5, 6)$ with a a radius of $8$. The area that is in the field but above the line $y = x$ is planted. What fraction of the field is planted?