Look at this series: U32, V29, __, X23, Y20, ... What number should fill the blank?

Look at this series: U32, V29, __, X23, Y20, ... What number should fi

1.	Look at this series: U32, V29, __, X23, Y20, ... What number should fill the blank?
A.	W26
B.	W17
C.	Z17
D.	Z26
Answer» B. W17