Question

1. in a book fair, there are 1000 books in the stock. They are biographies, fictions and more
fiction books. The ratio of biographies to fictions to non-fiction books is 4:7:9. The
book-fair coordinators add 25 biographies, 50 fictions and 100 non-fiction books to the
fair. What is the new ratio of the biographies to fictions to non-fiction books?
2. In a zoo, the ratio of the lions to the tigers is 5 : 6. When two new lions are added to the
group
the ratio of the lions to the tigers becomes 9:10. How many lions and tigers are
there in the zoo now?
3. Look at the proportion 8and 16 You can see that 16 is present twice in the diagonal
16 32
position. Here, 16, which is a repeated number, is called the geometric mean of the
other two numbers. Find a pair of numbers other than 8 and 32, which has 16 as the
geometric mean


4. Present age of Rohit and Mayank are in the ratio 4:3. After 9 years, the ratio of their
ages will be 11:9. Find their present ages.
5. Identify whether the following statement is proportional or non-proportional. Gokul
throws a ball 60 m and his friend Gagan throws a ball 40 m. Gokul throws 20 more
metres than Gagan.'​

Answer 1

Answer:

1. 5:9:13

2. 27

3. ?

4. ?

5. yes