What does this rebus puzzle means ?

A few friends are enjoying their sea voyage in a boat full of apples. On the way, they felt hungry and thus decided to eat the apples. Together, they ate two dozen of apples. When they have eaten the apples, will there be any change in the water level?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Which number comes next in the number series?

2, 9, 30, 93, ?

Can you decipher the below rebus?

PBLUESAISNUERSES

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

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

John is found dead in his office at his desk. The police have narrowed the suspects down to three people: Mrs. Jacob, John’s wife Hena and his business partner Jason . All three visited John on the day of his murder, but all three provide the police with stories of explanation as to the reason for their visit.
Police found John with his wrist watch still on his right arm, a torn up picture of his wife laying on the floor beside the trash can, and an ink pen in his right hand. On the desk, the police found a name plate, a telephone that was off the hook, and a personal calendar turned to the July 5th page with 7B91011 written on it. After examining this evidence, the police knew their suspect. Who was it ?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?