What does below pictogram mean?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

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

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

In order to complete the racing competition, the Mexico racetrack has to submit its top and the most famous three horses to win the competition. Due to an electrical storm, all the records are cleared and no one knows which horse holds the record. They all look identical and it becomes even more difficult to differentiate the horses. There are 25 horses in the Mexico racetrack. But there can be only five horses at a time on the track. What will the least number of races that can be conducted to find out the three fastest horses?

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

In the image below, can you find the value of an angle(y)

what's the probability of getting a king or a queen from a pack of 52 cards?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Can anyone tell me a word in the English dictionary which has a silent 'z'?