Quantitative Aptitude - Arithmetic Ability Questions

Akshar remembers that the match is after 26th April but before 30th April, while Suresh remembers that the match is after 22nd April but before 28th April. On which date of April is the match?

If the average age of 20 students in Class-I is 10 years and average age of 25 students in Class II is 12 years, find the average age (in years) of all students.

The zeros of the cubic polynomial 2x3-x2-2x+1 are a, b and c respectively. Find a+b+c :

∆PQR is right angled at Q. If sinP = 12/13, then what is the value of tanR?

What is the value of cot 5π/3?

For what value of k, the expression x6– 18x3 + k will be a perfect square?

If a+b=5 and a­b=3, then the value of (a2+b2) is

80 litre mixture of milk and water contains 10% milk. How much milk (in litres) must be added to make water percentage in the mixture as 80%?