225, or 15^2, is the first perfect square that begins with two 2s. What is the sum of the digits of the next perfect square to begin with two 2s?	Options.
A) 9 B) 12 C) 13 D) 14 E) 17
Because 16^2 = 256,y the next perfect square to begin with two 2s cannot be 3-digit.   Let's try 4-digit. 40^2 = 1,600 and 50^2 = 2,500. So, if there is a 4-digit perfect square to begin with two 2s it must be between 41^2 and 49^2. Test the middle number 45^2 = 2,025. Test larger number: 46^2 = 2,116. Test next number: 47^2 = 2,209. Bingo! The sum of the digits = 2 + 2 + 0 + 9= 
<gadget id="calculator">2 + 2 + 0 + 9</gadget>
<output>13</output>
13.   Answer: 13.
<result>C</result>
225, or 15^2, is the first perfect square that begins with two 2s. What is the sum of the digits of the next perfect square to begin with two 2s?