What number comes next in the series?

5 15 5 18 5 24 14 20 _

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

Can you make four (4) nines (9) equal 100?

Count the number of triangles in the picture below:

Can you find a rabbit in the given picture?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

If six children and two dogs were under an umbrella, how come none of them got wet?

Complete the given grid with valid words. You can only use the letters AAEEIIMMPPTT.

Hint: The grid reads the same across as down.

I know a nine-letter word having only one vowel.
Do you ?