Solve these:
1. There are 30 apples, half of them are ripe. How many apples are ripe ?
2. There are 36 children, half of them are boys. how many children are girls ?
3. There are 20 pencils, a quarter of them are blue. How  many pencils are blue ?
4. Sunil wants a pen, it costs Rs. 10. He gives a five-rupee coin, a tow rupee coin, a one rupee coin and a half rupee coin. Is it enough ?
5.  In a class of 60 students, 20 students come to school by bus. What fraction of students come by bus ?
6. Out of 40 girls, 10 girls can cook well. What fraction of girls can cook well ?
7 In a class of 50 boys, 25 like to play cricket. What fraction of boys like to play cricket ?
8. On a rainy day, 10 students got umbrellas to school. What fraction of students got umbrellas if the class has 40 students ?