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

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

Can you solve this picture maths equation?

What always comes into a house through the keyhole?

Why did Navjot Singh Sidhu put the new January calendar in the freezer

What is the largest number you can write with just 3 digits?

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

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

Which digit occurred maximum times between the number 1 and 1000?

On 26-01-2022, Juli was murdered at her house in a city in India in the afternoon. There were three suspects in the murder and the following are the statements that were given by them:

John: I visited my village that day.
Jacob: I was out to deposit my house tax in the municipality office at that time.
Jonny: I was at a friend's place having lunch at that time.

Can you find out who is the murderer?