Question 7
A pen costs 10 thousand đồng and a notebook costs 15 thousand đồng. An, Bình and Châu buy pens and notebooks as follows:
• An buys 23 pens and 12 notebooks.
• Bình buys 35 items altogether and spends 30 thousand đồng more than An.
• Châu spends more than Bình but buys fewer notebooks than Bình.
What is the smallest possible number of pens Châu buys?
• An buys 23 pens and 12 notebooks.
• Bình buys 35 items altogether and spends 30 thousand đồng more than An.
• Châu spends more than Bình but buys fewer notebooks than Bình.
What is the smallest possible number of pens Châu buys?