AMC8 2007
AMC8 2007 · Q3
AMC8 2007 · Q3. It mainly tests Primes & prime factorization.
What is the sum of the two smallest prime factors of 250?
250的两个最小质因数的和是多少？
(A)
2
2
(B)
5
5
(C)
7
7
(D)
10
10
(E)
12
12
Answer
Correct choice: (C)
正确答案：（C）
Solution
(C) The prime factorization of 250 is $2\cdot5\cdot5\cdot5$. The sum of 2 and 5 is 7.
（C）250 的质因数分解是 $2\cdot5\cdot5\cdot5$。2 和 5 的和是 7。
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