Quantitative Aptitude - Arithmetic Ability Questions

Ifx4 + (1/x4) = 34, then what is the value of x3 – (1/x3)?

Choose the word which is least like the other words in the group.

A rice trader buys 20 quintals of rice for Rs 8,580. However, 22% rice is lost in transportation. At what rate should he sell to earn 20% profit?

Amit donated 20% of his income to a school and deposited 20% of the remainder in his bank. If he is having Rs 12800 now, then what is the income (in Rs) of Amit?

In a match of 50 overs, team A’s average runs for first thirty overs was 4.5 runs/over while for the remaining 20 overs the average was 5.5 runs/over. Team B chased the target and lost by 10 runs. Find the average runs per over scored by team B. (team B played all the 50 overs). 

0.0245¯ written as a vulgar fraction in its simplest form = ?

If 6A = 11B = 7C; find A : B : C

If A : B = 2 : 5, B : C = 4 : 3 and C : D = 2 : 1, then what is value of A : C : D?