K-numbers are positive integers with only 2's as their digits. For example, 2, 22, and 222 are K-numbers. The K-weight of a number n is the minimum number of K-numbers that must be added together to equal n. For example, the K-weight of 50 is 5, because 50 = 22 + 22 + 2 + 2 + 2. What is the K-weight of 550?
Answers
A) 10  B) 11  C) 12  D) 13  E) 15
550 = 2*222 + (22*4) + 9*2   K weight of 600 = 2 +4+9= 
<gadget id="calculator">2 +4+9</gadget>
<output>15</output>
15   Answer 15
<result>E</result>
K-numbers are positive integers with only 2's as their digits. For example, 2, 22, and 222 are K-numbers. The K-weight of a number n is the minimum number of K-numbers that must be added together to equal n. For example, the K-weight of 50 is 5, because 50 = 22 + 22 + 2 + 2 + 2. What is the K-weight of 550?