两个合数是素数,它们的最小公倍数是260,求两个数.

两个合数是素数,它们的最小公倍数是260,求两个数.

题目
两个合数是素数,它们的最小公倍数是260,求两个数.
答案
  楼上说错了
  20+13=33不是素数啊,不满足楼主说的条件
  不过我用VB模拟了一下,就诶过仍然算不出楼主的谜底.
  话说真的有这样的数字吗?是不是楼主条件错了?
  下面是我的代码:
  Option Base 1
  Dim counter As Long
  Dim a() As Long
  Private Sub Command1_Click()
  Dim x As Long
  Dim y As Long
  counter = 0
  For var = 1 To 260
  got var
  Next var
  Print counter
  For x = 1 To counter
  For y = 1 To counter
  If a(x) > a(y) Then
  If a(x) * a(y) / 260 = MOD_(a(x),a(y)) Then
  Text1.Text = Text1.Text & a(x) & "—" & a(y) & Chr(13) & Chr(10)
  If pan(a(x) + a(y)) Then
  Text2.Text = Text2.Text & a(x) & "—" & a(y) & Chr(13) & Chr(10)
  End If
  End If
  Else
  If a(x) * a(y) / 260 = MOD_(a(y),a(x)) Then
  Text1.Text = Text1.Text & a(x) & "—" & a(y) & Chr(13) & Chr(10)
  If pan(a(x) + a(y)) Then
  Text2.Text = Text2.Text & a(x) & "—" & a(y) & Chr(13) & Chr(10)
  End If
  End If
  End If
  Next y
  Next x
  End Sub
  Function MOD_(ByVal x As Long,ByVal y As Long) As Long
  Do
  t = x Mod y
  x = y
  y = t
  Loop While t 0
  MOD_ = x
  End Function
  Private Sub got(ByVal var As Long)
  flag = 0
  For i = 2 To Int(Sqr(var))
  If var Mod i = 0 Then
  flag = flag + 1
  End If
  Next i
  If flag > 0 Then
  counter = counter + 1
  ReDim Preserve a(counter)
  a(counter) = var
  End If
  End Sub
  Function pan(ByVal var As Long) As Boolean
  flag = 0
  For i = 2 To Int(Sqr(var))
  If var Mod i = 0 Then
  flag = flag + 1
  End If
  Next i
  If flag = 0 Then
  pan = True
  Else
  pan = False
  End If
  End Function
  代码是没有错误的,我已经试验很多次了.
  如果我错了,烦请楼主知道答案时告诉我一声.
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
奥巴马演讲不用看稿子.为什么中国领导演讲要看?
想找英语初三上学期的首字母填空练习……
英语翻译
最新试题
热门考点

超级试练试题库

© 2017-2019 超级试练试题库,All Rights Reserved.