What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

What is always in front of you but can’t be seen?

Why is it very easy to weigh a fish?

During a secret mission, an agent gave the following code to the higher authorities
AIM DUE OAT TIE MOD

However, the information is in one word only and the rest are fake. To assist the authorities in understanding better, he also sent them a clue, If I tell you any one character of the code, you can easily find out the number of vowels in the codeword.

Can you find out the code word?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What is next number in the pattern below:

131 517 192 123 ?

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

Tell me the Hindi name of a Vegetable which if we remove 1st word will become a precious Stone and by removing the last word it will become a sweet eatable.

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

What can you deduce from the following BrainBat?

CRY
LMKI