Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

How can you make number one disappear by adding something to it?

What type of tree can I carry in my hand?

One night, a man runs away from home. He turns left and keeps running. After some time he turns left again and keeps running. Later, he turns left one more time and runs back home—but when he gets home, he finds a man in a mask. Who was the man in the mask?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

Take away the whole and some still remain. What is it?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.