Given: x is a non-negative integer. I. Given:8x is an even integer. 81=8,82=64. For both x=1 and x=2. We get 8x as even. ∴ Ι alone is not sufficient II. Given: 9x is an odd integer. 91=9,92=81 For both x=1 and x=2, we get 9x as odd. ∴ ΙΙ alone is not sufficient. I&II. Both together do not give any additional information to decide whether x is even or not.