ABC26GN0036 · Number System

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

Find the unit's digit in $(264)^{102}+(264)^{103}$.
Answer
Answer (as printed):
Explanation
Required unit's digit = unit's digit in (4)102 + (4)103. Now, 42 gives unit digit 6. \ (4)102 gives unit digit 6. (4)103 gives unit digit of the product (6 × 4) i.e., 4. Hence, unit’s digit in (264)102 + (264)103 = unit's digit in (6 + 4) = 0.

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

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