Given : an=k, where k is the remainder when n is divided by 5. a1=Rem(1÷5)=1, a3=Rem(3÷5)=3 a8=Rem(8÷5)=3 Similarly, a12=2,a13=3,a17=2 and a23=3 Thus, we have the observations as,1, 3, 3, 2, 3, 2, 3 The most frequently occurring observation is 3. ∴ Mode = 3