How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

Which five letter word can be added at the end of below word to form a
valid word?

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Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

You stand in front of two doors. A guard stands next to each door. You know the following things: one path leads to paradise, the other leads to death. You cannot distinguish between the two doors. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which door leads to paradise. What one question would you ask to guarantee you enter the door to paradise?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

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