How can you write nineteen in a manner that if we take out one, it becomes twenty?

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Why is 6 afraid of 7?

You can see three almost identical images below. Can you spot the odd one out from them?

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

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

A man dies of old age on his 25 birthday. How is this possible?