Question 3
A stationery store had a batch of ballpoint pens. One half and 3 more were sold on the first day. One half of the remaining stock and 9 more were sold on the second day. Finally 54 pens remained. How many pens were there originally?
Source glossary (English–Vietnamese): One half: một nửa; More: nhiều hơn; Remaining: phần còn lại; Left: còn lại; Originally: ban đầu.
Source glossary (English–Vietnamese): One half: một nửa; More: nhiều hơn; Remaining: phần còn lại; Left: còn lại; Originally: ban đầu.