Solution:

The man asked the king that he wanted to die of old age.

Solution:

It can be down as shown below.

Solution:

The husband had booked two tickets for departure and only one for the return. The travel agent told this information to the police and they immediately came to know that he had planned the murder right from the beginning.

Solution:

Put one red marble in one box and all other marbles in the 2nd box.

Probability :
50 + 24/49

Solution:

41312432

Solution:

20
Just count the nines in the numbers: 6, 16, 26, 36, 46, 56, 76, 86, 96, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69.
Note: 66 contains TWO nines

Solution:

See the figure for the answer. Wasn't it a bit tricky?

Solution:

Steps:
1) Light fire on first bar from both the ends and second bar from one end.

2) After 30 seconds(when first bar gets completely burned out) , burn the second bar from second end as well.

3) When second run completely gets burned , you know its 45 seconds.

Solution:

The attached picture gives away the solution. If you can find another solution, do send us yours.

Solution:

Move and then pour all juice from second glass to fifth glass.

Solution:

C7 => B8
Exchange pawn for a knight

Check-Mate

GameOver