The digit in the unit's place of [(251)98+(21)29- . .(106)100+(705)35-164+259 ] is

ABC26GN0245 · Number System

Subject: General Aptitude · Chapter: Number System · Exam: · Marks: · Difficulty:

The digit in the unit's place of $\left[(251)^{98}+(21)^{29}-\right.$ $\left.(106)^{100}+(705)^{35}-16^{4}+259\right]$ is

(a)1

(b)4

(c)5

(d)6

Answer

Answer (as printed): B

Explanation

Unit digit in $\left[(251)^{98}+(21)^{29}-(106)^{100}+(705)^{35}-(16)^{4}+\right.$ 259] = Unit digit in $(1+1-6+5-6+9)=4$.

Explanation as extracted from the printed page; notation may be imperfect.