Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

The Little ant seems to be always confused. Do you know why?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

What can you deduce from the following BrainBat?

CRY
LMKI

What type of tree can I carry in my hand?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

A guard is positioned at the one side of the bridge saying ‘A’. His task is to shoot all those who try to leave from ‘A’ to the other side and say ‘B’. He also need to welcome the person who comes from another side ‘B’ to his side ‘A’. The guard comes out of his post every 1 hour and looks down the bridge for any people trying to leave. You are at side ‘A’ and wish to go to another side ‘B’. you also know that it would take 1:45 hr to cross the bridge. How will you cross the bridge?

What English word has three consecutive double letters?