खालील मालिकेत (?) च्या जागी कोणती संख्या येईल? 4, 5, 8, 10, 12, 15, 16, 20, ?, 25

Two series alternate: 4, 8, 12, 16, 20 (multiples of 4) and 5, 10, 15, 20, 25 (multiples of 5). The missing term is 20.