Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

What does this rebus mean?

O
N
C
E
TIME

You have a thousand Re. 1 coins with you. You have ten bags with you and you can put any number of coins in each of the bags. The condition is that if someone asks you for any amount between 1 and 1000, you must be able to give that amount by just giving the bag (you are not allowed to open the bag and give coins).

How will you do it?

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

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

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

When my father was 31 I was 8. Now he is twice as old as me. How old am I?