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

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

How is the moon similar to a dollar?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

Which is faster, Heat or Cold ? Explain.

The more you take me, the more you leave me behind.
Who Am I?

What is the end of everything?

Which city is three-fifths chick two third cat and 50% goat?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.