alleryCan 4 to the power n end in the digit zero for any natural number n?
AYes, for every value of n
BNo, its only prime factor is 2
CYes, whenever n equals 5
DYes, whenever n is even
Answer & Solution
Correct answer: B. No, its only prime factor is 2
1. Ending in zero needs a factor of 5.
2. 4 to the n has only the prime 2.
3. So it never ends in zero.
_Source: syllabus Mathematics, Chapter 1, Real Numbers._
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