Quantitative Aptitude - Arithmetic Ability Questions

Speed of a boat along and against the current are 14 kms/hr and 8 kms/hr respectively. The speed of the current is

Two numbers are 35% and 50% lesser than a third number. By how much percent is the second number to be enhanced to make it equal to the first number? 

An engineering student has to secure 45% marks to pass. He gets 54 and fails by 36 marks. Find the maximum marks.

An alloy is made by mixing metal A costing Rs 2000/kg and metal B costing Rs 400/kg in the ratio A:B = 3:1. What is the cost (in Rs) of 8 kilograms of this alloy?

Two cars travel from city A to city B at a speed of 36 and 48 km/hr respectively. If one car takes 3 hours lesser time than the other car for the journey, then the distance between City A and City B is

If x + 1x = c + 1c, then the value of x =

If  tan2θ + cot2θ = 2, then what is the value of 2sec θ cosec θ?

ax + 5y = 8 has slope of -4/3. What is the value of a?