Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

What is next number in the pattern below:

131 517 192 123 ?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

What number do you get when you multiply all of the numbers on a telephone's number pad?

I have branches, but no fruit, trunk or leaves. What am I?

Can you make a six-letter word using the letters N, A and B ?

I am an odd number. Take away a letter and I become even. What number am I?

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

What building has the most stories?

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