Quantitative Aptitude - Arithmetic Ability Questions

The distance between the points (2, 7) and (k, -5) is 13. What is the value of k?

A can do 1/3rd of a job in 3 days and B can do half of the job in 9 days. If they work on it together, then in how many days can they finish half of the job?

The average of 100 items was found to be 30 . If at the time of calculation , two items were wrongly taken as 32 and 12 instead of 23 and 11 , then the correct average is

In a cyclic quadrilateral ABCD ∠BCD=120° and passes through the centre of the circle. Then ∠ABD = ?

Marked price of an item is Rs 500. On purchase of 2 items discount is 8%, on purchase of 3 items discount is 16%. Radha buys 5 items, what is the effective discount?

The diagonal of a square equals the side of an equilateral triangle. If the area of the square is 6√3 sq cm, what is the area of the equilateral triangle?

20% discount is offered on an item. By applying a promo code the customer wins 15% cash back. What is the effective discount?

ΔXYZ is right angled at Y. If m∠Z = 60°, then Cosec X =