What is next number in the pattern below:

131 517 192 123 ?

what does this below rebus represent identXQQQQQME

Identify the hidden meaning behind this picture?

what does the below rebus means?

I can write cow in 13 letters.

Can You?

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

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What can you see in the middle of March and April that you can never see in any other month?

Considering the below equation:

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

Then, I + II + III = ?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?