Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Before Mount Everest was discovered, what was the highest mountain in the world?

I am white when I am dirty, and black when I am clean. What am I?

If eleven plus two equals one, what does nine plus five equal?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

I have an eye but still cannot see.

Who am I?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?