Can you find the odd number in the following?

2716, 4135, 5321 and 7145

One night, Louis and Adam were sitting together. Adam was watching a movie while his wife Louis was reading a mystery book. Suddenly the power went out and Adam decided to go to bed, but strangely Louis kept on reading. There was no artificial light around, so Louis kept on reading. How come?

What goes up but never comes down?

Which Burger Is Different in below image?

Out of four images which one is the odd one out?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

Client Dempsey living in one of the East Coast states of the U.S. was talking to Landon Donovan, who was living in the West Coast state of the U.S.

Dempsey: What time is it?
Donovan: Wow, It is the same time here.

How is this possible?