Quantitative Aptitude - Arithmetic Ability Questions

Mehdi can complete a work in 25 hours. If he is joined by Jahnavi who is 50% more efficient, in what time will they together finish the work?

S and T can finish a work in 50 days. They worked together for 20 days and then left. How much of the work is left?

Mahanath works 2 times as fast as Sahay. If Sahay can complete a job alone in 21 days, then in how many days can they together finish the job?

Two water-squash mixtures, the first having a water-to-squash ratio of 4 : 1 and the other having a ratio of 3 : 1, are blended in the ratio 1 : 2. What is the water : squash ratio in the blend?

If 310 × 272 = 92 × 3n then the value of n is

A spherical lead ball of radius 6 cm is melted and small lead balls of radius 3 mm are made. The total number of possible small lead balls is

How many times in a week does both the hands of the clock will coincide with each other?

P(4,2) and R(-2,0) are vertices of a rhombus PQRS. What is the equation of diagonal QS.