Solution:

On a sailboat (sale boat).

Solution:

There are 3 fruits (1 grapes, 1 apples, and 1 oranges).

Solution:

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

Solution:

Solution is below

Solution:

"World War I" was named after after "World War II"

Solution:

The last marble will be yellow.

Since marbles can only be taken out in pairs and you started off with an odd number of yellows there is always going to be one yellow left over that you'll keep putting back in the box until it's left on it's own.

Solution:

Pages 19, 20, 23, 37, 38, & 42 will also be missing

Solution:

At 01:05

Solution:

If you see the picture, they formed a pentagonal shape and achieved the required.

Solution:

Ganpat had a black suit and a brown suit.
Harish had a brown suit and a pink suit.
Manoj had a white suit and a black suit.
Tarun had a pink suit and a white suit.

Solution:

Six.

There are only five colors, so six socks guarantee that two will be the same color.