What occurs twice in a week, once in a year but never in a day?

In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

Can you identify the hidden rebus in the image below?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

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?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

While sitting in the Car, John suddenly finds that one of the wheels was missing. John noticed that a killer is approaching towards him. John cannot get out of the car.

How will John escape?

When it's bad luck to meet a black cat?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

When is the top of a mountain similar to a savings account?