Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

What have one eye but still cannot see?

There was a strange boy who was born before his father. How can this be possible?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

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

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

What is the next number in this matchsticks series riddle?