Can you find out which number multiplied by itself will give the output as 12345678987654321?

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

Which Burger Is Different in below image?

Can you find out the total number of triangles in the given figure?

Rearrange the letters in "new door" to make one word.

In order to complete the racing competition, the Mexico racetrack has to submit its top and the most famous three horses to win the competition. Due to an electrical storm, all the records are cleared and no one knows which horse holds the record. They all look identical and it becomes even more difficult to differentiate the horses. There are 25 horses in the Mexico racetrack. But there can be only five horses at a time on the track. What will the least number of races that can be conducted to find out the three fastest horses?

What occurs twice in a week, once in a year but never in a day?

Solve the following series:
AZ, GT, MN, __, YB

Replace the question mark with the correct number.