What English word has three consecutive double letters?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

What is the word or phrase?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

Find out the number of circles in the given picture having Illusion

Replace the question mark with the correct number in below Picture:

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?