If it took eight men ten hours to build a wall, how long would it take four men to build it?

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?

Why do Chinese men eat more rice than Japanese men do ?

I look at you, you look at me, I raise my right, you raise your left. What am I?

What English word has three consecutive double letters?

What Does this text mean:

important=important

2, 3, 5, 9, 17, _ What is the next number in the sequence?

John was piloting a plane behind a car but was never able to overtake it. Why?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

A landlord calls both of his sons and tells them that their horses will now decide who will transfer the inheritance. He tells them to race along the land till the end and the one whose horse will be slower will win and be the heir to all the property.

Both of them keep wandering for days but to no result. Then they ask a wise man regarding it. The man advises them on the matter after which they jump on the horses and race as fast as they can till the end. Why did they do it?

What did the wise man say?