If a : b = 7 : 9 and b : c = 5 : 7, then what is a : c ?

A and B together have ₹ 158. C has ₹101 less than what A and B together have, and B has ₹ 23 more than C. The amount of A is:

A bag contains rupee, 50 - paise and 25 - paise coins in the ratio 2 : 3 : 4. If the total amount in the bag is Rs . 45, find the number of 50 - paise coins. 

Two numbers are in the ratio 3:5. If each number is increased by 10, the ratio becomes 5:7. The numbers are -

If A:B :: 6:11 and B:C :: 6:7, then A:C ::_____

The ratio of number of boys and girls in a school of 720 students is 7:5. How many more girls should be admitted to make the ratio 1 : 1?

The ratio of two numbers is 3:8 and their difference is 115. The smaller of the two numbers is:

The ratio of the marks of Kamlesh in the examination of two subjects English and Mathematics is 7 : 11. If he got 20 marks more in Mathematics than in English, then how many marks did he get in English?