Logic riddles

Logic riddles

Let's say some primitive organisms divide themselves every minute in two equals which also divide the next minute and so on. The saucer in which we started observing this process was full at 12.00.
When was it full to the half?

Answer

The saucer was half full at 11.59 - the next minute there will be twice as many of them
there (so full at 12.00).

I can travel from there to here by disappearing, and here to there by reappearing.
What am I?

Answer

The letter “t”.

Invisible until you spy me, I'm or mostly two but never three.
What am I?

Answer

Own eyes.

What country’s capital is growing the fastest?

Answer

Ireland’s capital. Every year it’s Dublin.

Thirty white horses stand on a red hill,
First they champ,
Then they stamp,
Then they stand still.

What are they?

Answer

Teeth.

it can be elder,
it can be young,
it can help you out sometimes,
it can be noisy,
it likes to play in hall,
it can be your best friend,
it can calm you down,
it will always be with you,
to have it is very good luck,
what is it?

Answer

a sister

A boy is stuck on a deserted island. There is a bridge to connect the island to the mainland. Halfway across the bridge there is a guard. The guard will not let anyone from the mainland to the island, or anyone from the island to the mainland. If the guard catches someone, he sends him or her back. The guard sleeps for 30 seconds and then is awake for 5 minutes. The island is surrounded by man-eating sharks, and the boy does not have anything with him except for his own shirt and his pants. It takes the boy 1 minute to cross the bridge. How does he cross the bridge without getting caught?

Answer

The boy runs halfway across the bridge and turns around. The boy looks like he is running to the island and is sent to the mainland.

Complete the series:

8, 14, 12, 11, 16, 8, 20, 5, ?

Answer

24
These are two alternating series with each next term is + 4 and -3.
Hence the answer will be 24

During the day, I follow one, during the night, I follow no one. What am I?

Answer

SUNFLOWER.

Owen was locked in a castle.
There was a robot by the door.
There was 2 vampires.
The robot said 12 then the first vampire said 6 then the door unlocked.
The robot said 6 then the second vampire said 3 then the door unlocked.
Then Owen challenged the robot.
The robot said 4.
What is the answer?

Answer

4, because the word "FOUR" has four letters. TWELVE has 6 and SIX has 3 letters.

My Dog had 7 Puppies. Their names were: All, Ball, Tall, Fall, Hall, Call, Wall.
What is the mothers name

Answer

Her name is 'What'.

I am a word which means a vivid form of text, remove first my letter and I am a word which means some/many years ago/back, add g before me and I become a name of a precious stone from which jewelries are made. What word am I?

Answer

Bold
Bold-B=Old Ol+G=Gold!
Simple

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