A person can buy a refrigerator for Rs.15,850 on cash payment or in installments for every year at 10% p.a for four years compounded annually. What is the approximate annual installment that he should pay?

5 men can do a piece of work in 6 days while 10 women can do it in 5 days. In how many days can 5 women and 3 men do it? 

In a triangle ABC, ∠ABC = 75⁰ and ∠ABC = π⁰/4, The circular measure of ∠BAC is :

The least value of n, such that (1 + 3 + 3² + ... + 3ⁿ) exceeds 2000, is-

If $$ {(\sqrt {3})^{5}× {9}^{2}={3^{n}{×3\sqrt {3}}}}$$ then value of n 

The HCF and LCM of two numbers are 12 and 336 respectively. If one of the number is 84, the other is

If a = 2.234, b = 3.121 and c = –5.355, then the value of $$ a^3 + b^3 + c^3 – 3abc$$ is

The ratio of income of A, B and C is 7: 9: 12 and their expense ratio is 8: 9: 15, if the savings of A is 1/4 of its total income, then the savings of A, B and C What will be the ratio?