The least number of complete years in which a sum of money put out at 20% compound interest will be more than doubled is:
Options:
A) 3 B) 4 C) 5 D) 6 E) 7
Explanation:   P(1+20/100)n&gt;2P =&gt;(6/5)n&gt;2.   Now,(6/5x6/5x6/5x6/5)&gt;2.   So, n=4years.   ANSWER IS 4
<result>B</result>
The least number of complete years in which a sum of money put out at 20% compound interest will be more than doubled is: