=IF(OR(A1={1,3,5,7,9,10,12,14,16,18}),"合单","合双") 这是我目前用的合数单双的公式

题目

=IF(OR(A1={1,3,5,7,9,10,12,14,16,18}),"合单","合双") 这是我目前用的合数单双的公式
有没有比这个更加简单的公式?
合单是：1,3,5,7,9,10,12,14,16,18,21,23,25,27,29,30,32,34,36,38,41,43,45,47,49,50,52.
合双是：2,4,6,8,11,13,15,17,19,20,22,24,26,28,31,33,35,37,39,40,42,44,46,48,51.

答案

=IF(MOD(LEFT(A1)+RIGHT(A1),2),"合单","合双")