Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Why 1729 is a magic number? Answer Logically.

Thomas has missed an excessive number of days of school, so he must meet with Principal Davis. Mr. Davis asks him "Why on Earth have you missed so many days?" Thomas replies "There just isn't enough time for school. I need 8 hours of sleep a day, which adds up to about 122 days a year. Weekends off is 104 days a year. Summer vacation is about 60 days. If I spend about an hour on each meal, that's 3 hours a day or 45 days a year. I need at least 2 hours of exercise and relaxation time each day to stay physically and mentally fit, adding another 30 days. Add all of that up and you get about 361 days. That only leaves 4 days for school." The principal knows Thomas is full of it, but can't figure out why. Where is Thomas going wrong?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?