How many quadrilaterals are there in the given figure ?

18 17 19 20

20

THE LOGIC; => 8 inner quadrilaterals + ABQR, QLVT, RPUS, LCMW, PDNU, QSCN, ABCD, QLRP, LCPD, ALBP, QRDC, SNRD Thus, total 20 quadrilaterals.