Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

Why do people go to bed?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

Can you spot the man between the coffee bean in the picture below ?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

Which is faster, Heat or Cold ? Explain.