How can you tell a raw egg from a hard-boiled egg?

In the image below, can you find the value of an angle(y)

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

Two natural numbers have a sum of less than 100 and are greater than one.

John knows the product of the numbers and Jacob knows the sum of numbers.

The following conversation takes place between them:
John: 'I am not aware of those numbers.'
Jacob: 'I knew you wouldn't be. I am not aware myself.'
John: 'Now I know them!'
Jacob: 'Now I know them, too!'

What are the two numbers?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

what does the below math rebus puzzle mean?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?