Given ratio are a : b = 2 : 3, b : c = 5 : 2, c : d = 1 : 4. Find a : b : c.

Two pipes P and Q can fill a tank in 20hrs and 25hrs respectively while a third pipe R can empty the tank in 30hrs. If all the pipes are opened together for 10hrs and then pipe R is closed then in what time the tank can be filled.

If there are Rs 495 in a bag in denominations of one-rupee, 50 paisa and 25 paisa coins, which are in the ratio 1 : 8 : 16. How many 50 paisa coins are there in the bag?

A bag contains 4 blue, 5 white and 6 green balls. Two balls are drawn at random. What is the probability that one ball is white?

What decimal of an hour is a second?

A line from center to circumference of a circle is known as:

What will be vulgar fraction of 0.0056?

Given \(A = 2^{65}\) and \(B = (2^{64} + 2^{63} + 2^{62} + ... + 2^0)\), which of the following is true?

One-fifth of a number is equal to \(\frac{5}{8}\)th of another number. If 35 is added to the first number, it becomes four times of the second number. Find the second number.