JEE PYQ: Binomial Theorem Question 27
Question 27 - 2020 (06 Sep Shift 1)
If ${p}$ denotes the fractional part of the number $p$, then $\left{\frac{3^{200}}{8}\right}$ is equal to:
(1) $\frac{5}{8}$ (2) $\frac{7}{8}$ (3) $\frac{3}{8}$ (4) $\frac{1}{8}$
Show Answer
Answer: (4)
Solution
$3^{200} = (1+8)^{100} = 1 + 8k$. Fractional part of $\frac{1+8k}{8} = \frac{1}{8}$.