On my sister's birthday, she was 126 cm in height, having grown 5% since the year before. How tall was she the previous year?  Choose one:
A) 124 cm	B) 120 cm	C) 116 cm	D) 112 cm	E) 110 cm
Let the previous year's height be x.   1.05x = 126   x = 120   The answer is 120 cm.
<result>B</result>
On my sister's birthday, she was 126 cm in height, having grown 5% since the year before. How tall was she the previous year?