contestada

Cynthia made the conjecture that the sum of any prime number and any composite number is a composite number.
 
Which equation is a counterexample to her conjecture?



 
A.
13 + 2 = 15


 
B.
11 + 9 = 20


 
C.
5 + 8 = 13


 
D.
11 + 2 = 13

Respuesta :

The answer is C.) 5+8=13. This is because 5 is a prime number, 8 is a composite number and the sum of the numbers is 13 which is a prime number. (a conjecture is a opinion, and a counterexample is an example that opposes the example)

Otras preguntas