What does it mean?

What does the below image rebus riddle means ?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

Which is the rope you never skip with?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

You need to arrange three 7 and mathematical symbols to form number 1?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

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?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?