Can you make four (4) nines (9) equal 100?

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?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

How many times in a given day, minutes and hour clock comes in a straight line ?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

You can win me and lose me but never buy me
You can not eat me and never want to part with me
I can make you cry or bring you joy
I am not a machine and definitely not a toy
You keep me but i am not forever just yours
You might find me in a case or on a shelf next to a vase
I am hard and i am tall if you bump me i am sure to fall
I am made of different materials and am at many events
If your lucky and fight hard I might be yours
What am I ?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?