When we see 2 but call 10?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

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

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

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

What kind of storm is always in a rush?

What question can you never answer yes to?

Which word does the below Plexor means ?