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

What has many keys but can’t open a single lock?

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

Using Only Five 5's and any mathematical operator make sum as 37

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

What English word has three consecutive double letters?

Which Travels Faster? Solve below famous picture riddle:

Can you find the key in the picture below?

There are three Athletes (John, Tarun and Harish) and their individual Coaches (Jacob, Meenaxi and Priyanka) standing on the shore.
No Coach trusts their Athlete to be near any other Coach unless they are also with them.
There is a boat that can hold a maximum of two persons.
How can the six people get across the river?

How many triangles can you count in the figure given?