You collect balls. Suppose you start out with 105. John gives you another 100 balls. How many balls do you have at the end? Pick one
A) 205 B) 105 C) 100 D) 502 E) 501
Solution   Start with 105 balls.   John gives you 100 balls:   105 + 100= 
<gadget id="calculator">  105 + 100</gadget>
<output>205</output>
205 balls.   So you have 205 balls at the end.   Correct answer: 205
<result>A</result>
You collect balls. Suppose you start out with 105. John gives you another 100 balls. How many balls do you have at the end?