Quantitative Aptitude - Arithmetic Ability Questions

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?

A and B together can complete a task in 12 days. However, if A works alone, completes half the job and leaves and then B works alone and competes the rest of the work, it takes 25 days in all to complete the work. If B is more efficient than A, how many days would it have taken B to do the work by herself?

The average age of 120 members of a society is 60.7 years. By addition of 30 new members, the average age becomes 56.3 years. What is the average age (in years) of newly joined members?

The compound interest earned in two years at 12% per annum is Rs 10176. What is the sum (in Rs) invested?

Calculate the value of 0.77777 + 0.7777 + 0.777 + 0.77 + 0.7 + 0.07.

The price of an article is cut by 24%, to restore to its original value, the new price must he increased by ______.

If 4x - 5(2x - 1) > 2x + 3 > 2 - 3x; then x can take which of the following values?

What would be the smaller of the two angles formed by the hour hand and the minute hand at 4:52 p.m?