Quantitative an...

A and B enter into a partnership business with capital investment in the respective ratio of 27: 40. At the end of 7 months, 'A' withdraws completely from the business. If 'A' and 'B' receive profit in the respective ratio of 21: 40, find out for how long was "B's capital used?

Machine A and machine B are each used to manufacture 660 bolts. It takes machine A 10 hours more than machine B to produce 660 bolts. Machine B produces 10 percent more bolts per hour than machine A. How many bolts per hour can machine A produce?

A thief goes away in a car at a speed of 60 kmph. A cop starts chasing the thief after 15 minutes in a car at a speed of 80 kmph. After how much time will cop overtake the theif?

The average of four positive integers is 72.5. The highest integer is 117 and the lowest integer is 15. The difference between the remaining two integers is 12. Which is the higher of these two remaining integers?

A man while returning from his factory, travels 2/3 of the distance by bus, 3/4 of the rest by car and remaining by foot. If he travels 2 km on foot, find the distance covered by him.

A square is drawn inside a square of perimeter 96 cm by leaving a gap of 1 cm all around. A third square is drawn inside the second square by leaving a gap of 1 cm all around and so on. What is the ratio of the area of the eighth square to the area of the smallest square?

Supply the missing digit in the number 3_930. The number is divisible by 3 and is divisible by only one of 11, 9 and 7 but is not divisible by 19. The number is:

2401 × 35² × 25⁴ / 7³ = 5^m × 7ⁿ, what are the value of m and n?

The value of each of a set of coins varies as the square of its diameter, if its thickness remains constant, and it varies as the thickness, if the diameter remains constant. If the diameter of two coins are in the ratio 4 : 3, what should be the ratio of their thickness be, if the value of the first is four times that of the second?

The present age of Charu is twice the present age of Prerna. Harsh is 4 years older to Charu. If the sum of the present ages of Prerna, Charu and Harsh is 74 years, what is the present age of Harsh (in years)?