Quantitative Aptitude - Arithmetic Ability Questions

Of the four numbers whose average is 91, the first is 3/10 times the sum of other three. The first number is:

If x+1x:x-1x=5:3 then the value of x is

What is the value of 1+aa1/2+a-1/2-a1/2+a-1/21+a+a-1/2 ?

10% discount is offered on an item. By applying a promo code the customer wins 20% cash back. What is the effective discount?

The ratio of present ages of R and S is 6:7. Before 12 years the ratio of their ages was 9:11. What is R's present age (in years)?

A box weighs 8.5 kg when full of sand and weighs 5.5 kg when it is half filled with sand . Weight of the empty box is

A train of length 100 m crosses another train of length 150 m, running on a parallel track in the opposite direction in 9 seconds. If the speed of trainhaving length 150 m is 40 km/hr, then what is the speed (in km/hr) of the other train?

Profit of Rs 104000 has to be divided among three partners Ashok, Bimla and Chirag in the ratio 6:4:3. How much does Chirag get?