甘肃省陇南市2026年重点学校初一入学数学分班考试试题及答案

-甘肃省陇南市2026年重点学校初一入学数学分班考试试题及答案一、选择题（25题）(1)下列哪个数是质数？A.15B.17C.21D.25答案：B解析：质数是指大于1的自然数，除了1和它本身外，不能被其他自然数整除的数。15能被3和5整除，21能被3和7整除，25能被5整除，因此都是合数。17没有除了1和它本身以外的因数，是质数。(2)下列说法正确的是？A.所有偶数都比奇数大B.0是偶数C.两个奇数的和是奇数D.两个偶数的和是奇数答案：B解析：0能被2整除，因此是偶数。两个奇数相加的和是偶数，两个偶数相加的和是偶数，因此A、C、D的说法错误。(3)一个数的最小因数是？A.0B.1C.2D.该数本身答案：B解析：所有自然数的最小因数都是1，因为1能整除任何自然数。(4)下列哪个分数是最大的？A.3/5B.4/7C.5/9D.2/3答案：D解析：将分数通分后比较：3/5=63/105，4/7=60/105，5/9=55/105，2/3=70/105，因此2/3最大。(5)1.25÷0.5=?A.2.5B.1.75C.2D.0.25答案：C解析：1.25÷0.5=1.25×2=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5÷0.5=2.5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