Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the odd word pair from the given alternatives.

What is the value of cos2A/(1 + sinA)?

Reflection of the point (4,-5) in the y-axis is

What is the value of z2+1z2 when z = 5+26 ?

Find the least number which when divided by 20, 25, 35 and 40 leaves remainder 14, 19, 29 and 34 respectively?

If 15 persons can do a job in 30 days, then 30 persons with twice the efficiency can do the same job in how many days?

1/3 part of a certain journey is covered with the speed of 25 km/hr, 1/2 part of the journey is covered with the speed of 45 km/hr and the remaining part covered with the speed of 37.5 km/hr. What is the average speed (in km/hr) for the whole journey?

A product was sold foe Rs. 4,500 at a profit of 12.5%. What was the amount of profit?