Quantitative Aptitude - Arithmetic Ability Questions

What is the effective discount on two successive discounts of 20% and 25%?

What is the value of 36+729381+643

In what ratio should tea costing Rs 300/kg be mixed with tea costing Rs 200/kg so that the cost of the mixture is Rs 225/kg?

Ram and Shyam undertook a work for Rs 5600. Ram alone can do the work in 5 days and Shyam alone can do the work in 9 days. If they worktogether, then what will be the difference (in Rs.) in the amount they receive?

What is the average of all natural numbers from 21 to 39?

If 27N4 is divisible by 11, then what is the value of N?

If cosec2 θ = 625/576, then what is the value of [(sin θ – cos θ)/(sin θ + cos θ)]?

In the following question, select the odd number from the given alternatives.