When it's bad luck to meet a black cat?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

How do you go from 98 to 720 using just one letter?

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

What number comes next in the series?

5 15 5 18 5 24 14 20 _

The owner of a popular clothing store comes up with his own method of pricing items. A vest costs $8, socks cost $10, a tie costs $6, and a blouse costs $12. Using the owner’s method, how much would a pair of underwear cost?

What does below pictogram mean?

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

Can you count the number of triangles in the picture below?