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 630?	Choose one:	A) 10	B) 11	C) 12	D) 13	E) 14
630 = 2*222 + (22*8) + 2*5   K weight of 600 = 2 +8+2= 
<gadget id="calculator">2 +8+2</gadget>
<output>12</output>
12   Answer12
<result>C</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 630?