You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What word does this rebus represent?

meta meta
meta meta

The more of this there is, the less you see. What is it?

Can you replace the question mark with the correct number?

For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
However, John offered a different proposition to the manager. The offers stand as:
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?

How many Watermelons are there in the below picture?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?