What is always in front of you but can’t be seen?

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

Can you guess the name of the month by looking the below rebus ?

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

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

Find the next number in the sequence

5 12 24 36 ?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?