Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

A horse was tied to a rope 5 meters long and the horses food was 15 meters away from the horse. How did the horse reach the food?

Can you replace the question mark with the correct number?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

Can you make a six-letter word using the letters N, A and B ?

Whats the next number in the below number sequence pattern.

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

What common phrase is represented by the below lines

Easy going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Medium going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Tough going:
Weak, 'I can't do it, I'm staying!'
Tough, 'Let's get going.'

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