Quantitative Aptitude - Arithmetic Ability Questions

What is the value of [cos (90 + A)÷sec (270 – A)] + [sin (270 + A)÷cosec (630 – A)]?

Value of (4a2+ 12ab + 9b2)/(2a + 3b) is

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

ABCD is square and CDE is an equilateral triangle outside the square. What is the value (in degrees) of ∠BEC?

If 10 people can do a job in 20 days,then 20 people with twice the efficiency can do the same job in

The sum of all prime numbers between 58 and 68 is

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?

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?