What is the fastest way to double your money?

Can you decipher the following common phrase?

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

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

What am I?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

A quarter is one-fourth of a dollar but Mr. John has changed the equation as below :

DOLLAR * 4 = QUARTER

Can you replace each letter with a digit to make the above solution correct?

Where do you go to learn how to make ice cream?

One night, a woman receives a call from the police. They tell her that her husband was murdered and that she should come to the crime scene as soon as possible. The woman drops the phone, shocked, and drives 20 minutes to the crime scene. As soon as she reaches the crime scene, the police arrest her and she is convicted of murder. How do the police know she committed the crime?

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?