Question 29
Mrs Wong is preparing gifts for the coming party. She buys 540 notepads, 720 pens and 900 pencils. The total cost of each type of stationery is equal. She divides the notepads equally in red gift boxes, pens equally in yellow gift boxes and pencils equally in blue gift boxes. She wishes that the cost of each gift box is equal and as low as possible. Find the number of notepads she needs to put in each red gift box.