From a circular sheet of paper with a radius of 20 cm, four circles of radius 5cm each are cut out. What is the ratio of the uncut to the cut portion?

If the ratio of sec w to cosec w is 1:7, then the ratio of tan w to cot w is

Sachin is younger than Rahul by 4 years. If their ages are in the respective ratio of 7 : 9, how old is sachin?

If 40%  of a number is equal to two-third of another number, what is the ratio of first number to the second number ?

Arun, Kamal and Vinay invested Rs. 8000, Rs. 4000 and Rs. 8000 respectively in a business. Arun left after six months. If after eight months, there was again of Rs. 4005, then what will be the share of Kamal?

5 (P ‘s Capital ) = 10 (Q’s Capital)=15 (R’s Capital) then the ratio of their capital is

If( 4x² – 3y²) : (2x² + 5y²)= 12 : 19, then (x : y) is:

A, B and C enter into a partnership. A initially invests Rs. 25 lakhs and adds another Rs. 10 lakhs after  one year. B initially invests Rs. 35 lakhs and withdraws Rs. 10 lakhs after 2 years and C invests Rs. 30 lakhs. In what ratio should the profits be divided at the end of 3 years?

A, B and C enter into a partnership and their shares are in the ratio 1/2 : 1/3 : 1/4. After 2 months, A withdraws half of his capital and 10 months, a profit of Rs. 378 is divided among them. What is B’s share?

A certain amount was divided between A and B in the ratio 4 : 3. If B’s share was Rs. 4800, the total amount was: