If we substitute 1 to 24 indicating hours on the dial of a clock day and night by the letters of the English alphabet their order starting with C which letter will represent 16 hours?

In a lake, there are 10 steps labelled using alphabets from A to J. Starting from step A, every minute a frog jumps to the 4th step from where it started - that is from the step A it would go to the step E and from E it would go to the step I and from I it would go to C etc. Where would the frog be at the 60th minute if it starts at the step A ?

In a family there are several brothers and sisters. Every 2 boys have brothers as many as sisters and each girl has 2 brothers less than twice as many brothers as sisters. Now find the number of boys and girls.

In a row of trees, a tree is 7^th from left end and 14^th from right end. How many tree are there in the row ?

B is twice as old as A but twice younger than F. C is half the age of A but is twice older than D. Who is the second oldest ?