Can you count the number of lines in the below picture?

I am quite hot but become too cold if you remove the first two letters. What am I?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

what does the below math rebus puzzle mean?

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?)

No matter how little or how much you use me, you change me every month. What am I?

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

By adding four matchsticks, can you divide the square shown in the picture into two equal parts?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?