What does an Island and the letter T have in common?

A man wants to cross the pit of fire which is 25 feet in length and he has 2 planks(fire resistant) 19 feet in length. How can he cross the pit of fire alive?

What does below Rebus mean ?

esgg sgeg gegs gsge

What has a bottom at the top?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

Find the missing number in the image below.

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

What breaks yet never falls, and what falls yet never breaks?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

A crime was committed at baker street. Ibrahim Dakota who was shot in the stomach was the main suspect. Sherlock questioned the suspect. The conversation started as:
Sherlock: What's your story, Ibrahim?
Ibrahim: I was walking around baker street and suddenly a man from the back shot me. I ran as fast as I could to save my life".
Sherlock: That is enough (and ask the police to arrest him).

Why does Sherlock think he is the murderer?