Why 1729 is a magic number? Answer Logically.

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

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 the next number in this series?

4,12,84,3612....

What is the word or phrase below?
R | E | A | D

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

What is the word or phrase?

Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.