Which is heavier: a ton of bricks or a ton of feathers?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

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

A woman named Maria was at the funeral of her mother. She met a nice young man that she had never seen before and after the service, they spent a bit of time together. Then she got busy and didn’t get his name or phone number before he left. She tried to find him, but no one knew who he was or how to contact him. A few weeks later, Maria’s older sister dies and the police suspect murder. Who killed the sister?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

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

Can you count the number of matches in the picture below ?