Question

3. What would be the value of n for n
2–1 divisible by 8.

Answer 1

The value of n has to be odd. First value of n is 3. 3^2 - 1 = 9–1 = 8.

Next, x = 5, 5^2 - 1 = 24.

Next, x=7. 7^2 - 1 = 49–1 = 48.

Next, x = 9, 9^2–1 = 81–1 = 80.

Next, x = 11, 11^2 - 1 = 121–1 = 120.

Thus any odd value of n will do the trick.