Can you find the thief by just looking at the picture below?

What has a ring but no finger?

What is the coolest letter in the alphabet?

If,

A = 1

B = 2

C = 3

...

...

Z = 26.

Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.

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?

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

What is the next number in this series?

4,12,84,3612....

What is full of holes but still holds water?

Find the next number in the following series:
6, 14, 26, 98, __?