Quantitative Aptitude - Arithmetic Ability Questions

There are a total of 200 students in a school, of which 7/10th are boys. Find the number of girls in the school.

A man covered a certain distance by a train at the speed of 40 km/hr and covers the same distance back by walking at the speed of 8 km/hr. Ifthe whole journey took 12 hours, then what is the one side distance (in km)?

If a:b = 3:8, find the value of (5a ­ 3b)/(2a + b).

The ratio of incomes of C and D is 3 : 2. Ratio of income of D and E is 5 : 4. If one-third of C’s income is Rs 4000 more than the half of E’s income, then what is the D’s income (in Rs)?

If sec (4x - 50°) = cosec(50° - x), Then the value of x is

What is the value of 143 + 163 + 183 + ... + 303?

The sum of a number and 4 times its reciprocal is 5. What is the number?

If a2+b2c2 = b2+c2a2 = c2+a2b2 = 1k k≠0 then k =