How can you make number one disappear by adding something to it?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

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

What is the last thing you take off before bed?

A newspaper is supposed to have 60 pages.Pages 14 and 21 are missing from the newspaper.

Can you tell me , Which other pages won't be there as well ?

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

Doctor Alex and a bus driver John are both in love with the same woman named Olivia. The bus driver need to go for a long trip of 10 days, Before he left he gave Olivia 10 apples.

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?