In a college, 70 percent of students study math, 75 percent of students study English, 85 percent study French and 80 percent study German. Can you find out the percentage of students who study all 4 subjects ?
A man is sitting alone on a bench in the park you go for your regular morning walks. In his hand, there is a picture at which he is looking constantly without blinking his eyes. You go to that man to find out. You ask him, 'Who is the bright person in that picture?' To your question he replies, 'Sisters and brothers I have none, but that manâs father is my fatherâs son' and then turns back to look at the picture. Can you tell the person in the picture?