You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

A girl rode into a tourist spot out of the city on Thursday. She loved the place and decided to stay for a few days. She stayed for four days and then she left for back home on Thursday.

How can this be possible?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

Can you find the company name in the pictogram below?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

What number do you get when you multiply all of the numbers on a telephone's number pad?