What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

All Marigolds are flowers.
Few Flowers are used to make colors.
Therefore, some Marigold are used to make colors.

True Or False?

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

Name a key which is hardest to turn.

John asked Jack, "The time right now is 7 pm. Can you tell me what will be the time 23, 999, 995 hours later ?"

While Bella does not know the answer, do you ?

Manish and Manoj play 5 games of chess.
Both Manish and Manoj win the exact same number of games. There is no tie at all.

How?