Level 2
If 1 coin has to be placed at each corner of the triangle and the rest are equally distributed at the sides, how many coins are required to make sure that there are 4 coins on each side?
Level 2
If 1 coin has to be placed at each corner of the triangle and the rest are equally distributed at the sides, how many coins are required to make sure that there are 4 coins on each side?
Level 3
Peter made 76 paper aeroplanes in four days. Each day after the first day, he made 6 less paper aeroplanes than the day before. How many paper aeroplanes did he make on the first day?