Quantitative Aptitude - Arithmetic Ability Questions

In an ornament the ratio of gold and copper is 3:2. The percentage of gold in the ornament is:

If x1/4 + x-1/4 = 2, then what is the value of x81 + (1/x81)?

Common factor of 24b6c8d2, 18a6c2d4, 12a4b4 is

Find out the odd word/letters/number/number pair from the given alternatives.

The angle of elevation of the top of a tower, vertically erected in the middle of a paddy field, from two points on a horizontal line through the foot of the tower are given to be α and β (α>β). The height of the tower is h unit. A possible distance (in the same unit) between the points is

A fan was sold for Rs. 3600 at a loss of 4%. What would be the gain or loss percent ifit was sold for Rs. 4200?

By what fraction selling price (S.P.) must be multiplied to get the cost price (C.P.) if the loss is 20% ?

A truck moves at the speed of 90 km/hr after repairing and moves at the speed of 80 km/hr before repairing. It covers x distance in 8 hours after repairing. How much time (in hours) will it take to cover 4x distance before repairing?