Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

Why 1729 is a magic number? Answer Logically.

Can you find out who is the kidnapper in below Picture and why, Explain ?

Find the number of squares in the below-given picture.

What's the only room from which no one can enter or leave

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

The richest man in the city Mr Rechard is kidnapped. James Bond is appointed to the case. At the crime scene, a note is found written by Mr Richard. The note read:

"First of January, Fourth of October, Fifth of March, Third of June."

James Bond knew that somehow, the killer's name was hidden in the note. The following were the suspects:

Jack Richard, the son and the heir of property.
John Jacobson, the employee of Richard.
June Richard, the wife of Richard.

James Bond took only a few moments to deduce the killer's name. Can you tell who was the killer?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

You can see three almost identical images below. Can you spot the odd one out from them?

I left my campsite and hiked south for 3 miles. Then I turned east and hiked for 3 miles. I then turned north and hiked for 3 miles, at which time I came upon a bear inside my tent eating my food! What colour was the bear?