Quantitative Aptitude - Arithmetic Ability Questions

Find the odd words/letters/number from the given alternatives.

Ravi had five subjects in his final examination. The maximum marks in each subject are 100. If his percentage in four subjects is 80, and he scores 65 marks in the fifth subject, determine his overall percentage for the five subjects.

What is the reflection of the point (3,-5) in the origin?

If 3.352 -­ (9.759 -­ x ) -­ 19.64 = 7.052, then what is the value of x?

If a+1a=2 then the vealue of a5+1a5 will be

In a mixture, water and milk are in the ratio of 3 : 5. In the second mixture, the ratio of water and milk is 9 : 11. If these two mixtures be mixed to form anew mixture in which water and milk are in ratio 5 : 7, then what is the ratio of these two mixtures in the new mixture?

Two donkeys are standing 400 meters apart. First donkey can run at a speed of 3 m/sec and the second can run at 2 m/sec. If two donkeys run towards each other after how much time (in sec) will they bump into each other?