Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

Replace the question mark with the correct number.

Count the number of triangles in the picture below:

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Can you move 2 matchsticks to form four equal sized squares.

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me:

'The property was originally on a 99 years lease and two-thirds of the time passed is equal to four-fifths of the time to come. Now work it out for yourself and see how many years are to go!

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?