A sum of money borrowed on simple interest amounts to Rs.720 after 2 years and Rs.1020 after a further period of 5 years. The borrowed sum of money is:

A can do a piece of work in 20 days, while A and B together can do it in 12 days and A, B and C all together can do it in 10 days. In how many days will the work be done if they work for a day in the pattern (A, A and B, A and C, A, .....)?

Three numbers are in the ratio 3/4 : 5/6 : 1/2 and the difference between the greatest and the smallest numbers is 12. What is the difference between the squares of the largest and the smallest numbers?

If 20% of A = 15% of B = (1/4)C, then A : B : C is

7.038 + 27.3 + 1.0079 + 3.035 + 0.8 + 14 = _________

If the difference between the simple interest received from two different sources on Rs.1000 for 3 years is Rs.90, then the difference between their rates of interest is:

The average of all the numbers between 8 and 33, and which are divisible by 5 is:

Two identical cups have milk in them up to 2/3 and 4/5 of their volumes, respectively. Water is poured to fill the cups. Then the mixtures of the two cups are mixed. What is the ratio of water to milk in the new mixture?

68% of a number is more than its 52% by 64. What is 75% of this number?