If eleven plus two equals one, what does nine plus five equal?

What does below chemistry rebus means?

A blonde put eyeliner on her head. Why?

What has one letter and starts with an E?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

What is the centre of gravity?

Sally lives in a place where six months of the year is mild summer and the temperature drops significantly the other six months. She owns a lake where there is a small island. She wants to build a house on the island and needs to get materials there. She doesn’t have a boat, plane, or anything to transport them to the island. How does Sally solve this problem?

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