What does below rebus means ?

Give it food and it will live; give it water and it will die.

John is selling fruits.
He sells grapes at $30, Dates $25, and a Wolfberry $45.
At what price does he sell fig?

PS: Logical Thinking

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

Forwards I am heavy, backward I am not. What am I?

If six children and two dogs were under an umbrella, how come none of them got wet?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

We have arranged an array of numbers below. What you have to do is use any kind of mathematical symbol you know excluding any symbol that contains a number like cube root. You can use any amount of symbols but you have to come up with a valid equation for all of them.

0 0 0 = 6
1 1 1 = 6
2 + 2 + 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

What is next number in the pattern below:

131 517 192 123 ?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?