In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

It is always ahead of me yet I can never see it. What is it?

What Adam and Eve do not have but the rest of the people have?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

Can you solve the below tricky visual equation?

Can you identify if it's a murder or a suicide ?