统计学

统 = 充 + 纟 : The president (统) wants to unite (统) the country, so he sets up free mobile phone chargers (充) for everyone inside of the engine ((e)ng3). As soon as he plugged in the first few chargers there are already a silk worm (纟) and Tommy Turtle (tu) peacefully sitting next to each other to charge their phones.

计 = 十 + 讠 : Joan of Arc inspects an advertising column in the space station's bathroom. On it there is an intricate pattern of crosses. With an calculator she tries to calculate the overall area the crosses take on the advertising column.

计 = 十 + 讠 : Joan of Arc inspects an advertising column in the space station's bathroom. On it there is an intricate pattern of crosses. With an calculator she tries to calculate the overall area the crosses take on the advertising column.

学 = 小 + 冖 + 子 : Xu Xian wants to study scienceology and learn more about daisies. Just inside the elevator's kitchen, he put some daisies into a prize cup and covered them with a cooking top. He wants to study the growth rate of the daisies depending on the pH of the water in the prize cup.