Why is Saturday stronger than Monday?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

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?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

A person was found dead on a big green land with no trees or buildings around. When the police arrived, they found a piece of rock lying next to him and the man was wearing clothes comprising of red, blue and yellow colours.

Can you tell who the person is and what was the cause of death?

A man wants to cross the pit of fire which is 25 feet in length and he has 2 planks(fire resistant) 19 feet in length. How can he cross the pit of fire alive?

What number do you get when you multiply all of the numbers on a telephone's number pad?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

What does below chemistry rebus means?