What is the least prime number which can be written as a sum of two composite numbers?
A.
7
B.
11
C.
13
D.
none of above
Exam No：2020 First Round Grades 10-12 Year：2020 Question No：20
Answer:
C
Knowledge points:
G10-12 - Number Theory - Prime Factorization (Reasoning)
Solution:
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