I’m tall when I’m young, and I’m short when I’m old. What am I?

What is the next number in this series?

4,12,84,3612....

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

Can you find out the total number of triangles in the given figure?

Next Number in the Series,

5, 16, 49, 104, ?

If Japan and Panama decided to merge into a single country, probably people will name it Japanama.

Can you think of two more such country's unions that could produce similar names like Japanama by overlapping their three letters?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.