Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

Can you find the six hidden animals in the picture below?

Can you solve the below tricky visual equation?

A person is found murdered in his Chamber. When the crime scene is investigated, the Investigator find out that there is a calendar on which the victim has written a few numbers with his blood. The numbers are 4, 11, 11 and 4.

There are four suspects in the murder, John, Jacob, Anna and Lee. Can you find out who is the murderer?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

what's the probability of getting a king or a queen from a pack of 52 cards?

Astrology starts with the alphabet A, Biology starts with B, Psychology with P and Limnology with L.

Can you find an "ology" that begins with a P?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

what does the below math rebus puzzle mean?