偶数问题大全及答案
更新时间:2021-06-23
类型:小学五年级数学题
题数:363
答:
根据质数、偶数、合数的定义可知,大于2的两个质数的乘积一定是合数.故答案为:合数.
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答:
13,23,27,31,33,37,41,49,53,57,61,69,73,79,83,87,91,93,95,99;22,28,38,40,58,88,96,98,100;13,23,31,37,41,53,61,73,79,83,91;22,27,28,33,38,40,49,57,58,69,87,88,93,95,96,98,99,100
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答:
既不是质数,又不是偶数的最小自然数是1;故答案为:1.
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答:
(1)√;(2)×;(3)√;(4)√;(5)×
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答:
4,10,20,32,60,100,118,240,300,1240;7,15,45,7789;4,10,20,32,60,100,118,120,300,1240;10,15,20,45,60,100,240,300;15,45,60,240,300;10,20,60,100,240,300,1240
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答:
200,140,30,60;363,55,175,25;200,38,140,30,96,18,12,60
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答:
75,42,30,51,87,99,105,102;75,30,35,105;75,51,87,53,105,23;42,30,2,102;2,53,23;75,42,30,35,87,99,105,102;42,30,102;30
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答:
质数——2,97;奇数——25,9,1,81,97,57,45;3的倍数——9,81,57,45,78合数——25,9,81,57,45,78;偶数——2,78;5的倍数——25,45
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答:
56,80,130;80,95,130,135;56,80,130;95,135,789;80,130
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答:
(1)205,285,805,825(2)250,280,520,580,820,850,502,508,258,208,802,852,582,528(3)250,280,520,580,820,850,502,508,258,208,802,852,582,528(4)205,285,805,825,250,280,520,580,820,850(5)285,825,258,582,852,528(6)258,582,852,528(7)250,280,520,580,820,850(8)285,82
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答:
1.50、54、40、70、74;2.50、45、40、75、70;3.50、40、70
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