1 votes 1 votes Let $b$ be a positive integer and $a = b^2 – b$. If b $\geq$ 4, then $a^2 – 2a$ is divisible by $15$ $20$ $24$ None of these Quantitative Aptitude cat2001 quantitative-aptitude algebra + – go_editor asked Apr 1, 2016 • edited Apr 10, 2022 by Lakshman Bhaiya go_editor 13.9k points 356 views answer comment Share See all 0 reply Please log in or register to add a comment.