What is the next number in this series?

4,12,84,3612....

What number comes next in this sequence:
7 8 5 5 3 4 4 _

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

Find the last number in the series below:

voN luJ yaM raM ---

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

If 1+9+8=1, what is 2+8+9?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?