What is the coolest letter in the alphabet?

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"

Count the number of triangles in the picture below:

With the help clues provided in the image, can you find the 5 digit key?

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

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

A cat, a dog and a monkey were stolen. 3 suspects got caught: Harish, Manoj and Tarun. All we know is each person stole one animal, but we do not know who stole which. Here are the investigation statements. Harish said: Tarun stole the cat. Manoj said: Tarun stole the dog. Tarun said: They both were lying. I did not steal the cat or the dog. Later on, the police found out the man who stole the monkey told a lie. The man who stole the cat told the truth. Can you find out who stole which?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?