Why do we preferably have round manhole covers and not square ones?

Find the next number in the sequence

5 12 24 36 ?

We can be boring,Or interesting.
We can be long,Or short.
We can have pictures,Or just words.
Many love us,But many also hate us.
What are we?

Spot 5 differences in two Christmas tree below:

A man died, leaving $10,000,000 for his widow, 5 sons and 4 daughters. Each daughter received an equal amount, each son received twice as much as a daughter, and the widow received three times as much as a son.

How much did the widow receive?

Can you replace the question mark with the correct number?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

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

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

In a fruit store, there was a unique weighing machine that was made to weigh only cherries and strawberries as they were priced the same.

Other fruits like watermelons or mango had different machines as they were expensive.

A man successfully buys watermelons at the price of cherries. How?