Brain Teasers and Puzzles 

Workings

Hint
The answers are related to time.

Answer
60.

The numbers represent 100 years in a century, 365 days in a year, 24 hours in a day, 60 minutes in an hour and 60 seconds in an minute.

Workings

Hint
Try writing the numbers as words.

Answer
22.

This is a sequence of numbers that contain the letter O.

One, two, four, fourteen, twenty-one, twenty-two.

Workings

Hint
What is the difference between each number?

Answer
14.

Add 3 to the previous term.

Workings

Hint
There are two merged sequences.

Answer
10.

Reasoning
There are two sequences mixed together.

0 1 2 3 4 5

and

0 2 4 6 8 {?}