What is next number in the pattern below:

131 517 192 123 ?

It is a six-letter word.
The first four letters are me.
The second and last letters are the same.
The fourth second and last letter is payment.

Who is it?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

The centre of the third figure is empty. What digit should fit inside?

Which five letter word can be added at the end of below word to form a
valid word?

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I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

Which is heavier: a ton of bricks or a ton of feathers?