I'm not sure how to determine if it contains numeric characters without VBA (unless a number would ALWAYS appear at the end, in which case it can be easily tested), but to get if it is Mixed, Lower, or Upper, you can use:
Excel 2003<TABLE style="BORDER-RIGHT: #a6aab6 1px solid; BORDER-TOP: #a6aab6 1px solid; BORDER-LEFT: #a6aab6 1px solid; BORDER-BOTTOM: #a6aab6 1px solid; BORDER-COLLAPSE: collapse; BACKGROUND-COLOR: #ffffff" cellPadding=2 rules=all><COLGROUP><COL style="BACKGROUND-COLOR: #e0e0f0" width=25><COL><COL></COLGROUP><THEAD><TR style="COLOR: #161120; BACKGROUND-COLOR: #e0e0f0; TEXT-ALIGN: center"><TH></TH><TH>A</TH><TH>B</TH></TR></THEAD><TBODY><TR><TD style="COLOR: #161120; TEXT-ALIGN: center">1</TD><TD>Alpha</TD><TD>Mixed</TD></TR><TR><TD style="COLOR: #161120; TEXT-ALIGN: center">2</TD><TD>beta</TD><TD>Lower</TD></TR><TR><TD style="COLOR: #161120; TEXT-ALIGN: center">3</TD><TD>Beta</TD><TD>Mixed</TD></TR><TR><TD style="COLOR: #161120; TEXT-ALIGN: center">4</TD><TD>BETA</TD><TD>Upper</TD></TR><TR><TD style="COLOR: #161120; TEXT-ALIGN: center">5</TD><TD>zeta</TD><TD>Lower</TD></TR><TR><TD style="COLOR: #161120; TEXT-ALIGN: center">6</TD><TD>Alpha2</TD><TD>Mixed</TD></TR><TR><TD style="COLOR: #161120; TEXT-ALIGN: center">7</TD><TD>alpha2</TD><TD>Lower</TD></TR></TBODY></TABLE><TABLE style="BORDER-RIGHT: #a6aab6 1px solid; BORDER-TOP: #a6aab6 1px solid; BORDER-LEFT: #a6aab6 1px solid; BORDER-BOTTOM: #a6aab6 1px solid; BORDER-COLLAPSE: collapse; BACKGROUND-COLOR: #ffffff" cellPadding=2 rules=all><THEAD><TR style="COLOR: #161120; BACKGROUND-COLOR: #e0e0f0; TEXT-ALIGN: center"><TH>Sheet1</TH></TR></TD></THEAD><TBODY></TBODY></TABLE>
<TABLE style="BORDER-RIGHT: black 2px solid; PADDING-RIGHT: 0.4em; BORDER-TOP: black 2px solid; PADDING-LEFT: 0.4em; PADDING-BOTTOM: 0.4em; BORDER-LEFT: black 2px solid; PADDING-TOP: 0.4em; BORDER-BOTTOM: black 2px solid; BORDER-COLLAPSE: collapse; BACKGROUND-COLOR: #ffffff" cellPadding=2 rules=all width="85%"><TBODY><TR><TD style="PADDING-RIGHT: 6px; PADDING-LEFT: 6px; PADDING-BOTTOM: 6px; PADDING-TOP: 6px">Worksheet Formulas<TABLE style="BORDER-RIGHT: #a6aab6 1px solid; BORDER-TOP: #a6aab6 1px solid; BORDER-LEFT: #a6aab6 1px solid; BORDER-BOTTOM: #a6aab6 1px solid; BORDER-COLLAPSE: collapse; BACKGROUND-COLOR: #ffffff; TEXT-ALIGN: center" cellPadding=2 rules=all width="100%"><THEAD><TR style="COLOR: #161120; BACKGROUND-COLOR: #e0e0f0"><TH width=10>Cell</TH><TH style="PADDING-LEFT: 5px; TEXT-ALIGN: left">Formula</TH></TR></THEAD><TBODY><TR><TH style="COLOR: #161120; BACKGROUND-COLOR: #e0e0f0" width=10>B1</TH><TD style="TEXT-ALIGN: left">=IF(ISERROR(FIND(UPPER(A1),A1)),IF(ISERROR(FIND(LOWER(A1),A1)),IF(ISERROR(FIND(PROPER(A1),A1)),"","Mixed"),"Lower"),"Upper")</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
If an alpha-numeric value would always end up having the number on the end, you can use:
<b>Excel 2003</b><table cellpadding="2.5px" rules="all" style=";background-color: #FFFFFF;border: 1px solid;border-collapse: collapse; border-color: #A6AAB6"><colgroup><col width="25px" style="background-color: #E0E0F0" /><col /><col /></colgroup><thead><tr style=" background-color: #E0E0F0;text-align: center;color: #161120"><th></th><th>A</th><th>B</th></tr></thead><tbody><tr ><td style="color: #161120;text-align: center;">1</td><td style=";">Alpha</td><td style=";">Mixed</td></tr><tr ><td style="color: #161120;text-align: center;">2</td><td style=";">beta</td><td style=";">Lower</td></tr><tr ><td style="color: #161120;text-align: center;">3</td><td style=";">Beta</td><td style=";">Mixed</td></tr><tr ><td style="color: #161120;text-align: center;">4</td><td style=";">BETA</td><td style=";">Upper</td></tr><tr ><td style="color: #161120;text-align: center;">5</td><td style=";">zeta</td><td style=";">Lower</td></tr><tr ><td style="color: #161120;text-align: center;">6</td><td style=";">Alpha2</td><td style=";">Mixed_Numeric</td></tr><tr ><td style="color: #161120;text-align: center;">7</td><td style=";">alpha2</td><td style=";">Lower_Numeric</td></tr></tbody></table><table cellpadding="2.5px" rules="all" style=";background-color: #FFFFFF;border: 1px solid;border-collapse: collapse; border-color: #A6AAB6"><thead><tr style="background-color: #E0E0F0;text-align: center;color: #161120"><th><b>Sheet1</b></th></tr></td></thead></table><br /><br /><table width="85%" cellpadding="2.5px" rules="all" style=";border: 2px solid black;border-collapse:collapse;padding: 0.4em;background-color: #FFFFFF" ><tr><td style="padding:6px" ><b>Worksheet Formulas</b><table cellpadding="2.5px" width="100%" rules="all" style="border: 1px solid;text-align:center;background-color: #FFFFFF;border-collapse: collapse; border-color: #A6AAB6"><thead><tr style=" background-color: #E0E0F0;color: #161120"><th width="10px">Cell</th><th style="text-align:left;padding-left:5px;">Formula</th></tr></thead><tbody><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">B1</th><td style="text-align:left">=IF(<font color="Blue">ISERROR(<font color="Red">FIND(<font color="Green">UPPER(<font color="Purple">A1</font>),A1</font>)</font>),IF(<font color="Red">ISERROR(<font color="Green">FIND(<font color="Purple">LOWER(<font color="Teal">A1</font>),A1</font>)</font>),IF(<font color="Green">ISERROR(<font color="Purple">FIND(<font color="Teal">PROPER(<font color="#FF00FF">A1</font>),A1</font>)</font>),"","Mixed"</font>),"Lower"</font>),"Upper"</font>) & IF(<font color="Blue">ISERROR(<font color="Red">RIGHT(<font color="Green">A1,1</font>)+0</font>),"","_Numeric"</font>)</td></tr></tbody></table></td></tr></table><br />