A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

A man dies of old age on his 25 birthday. How is this possible?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

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

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

What is the next number in this matchsticks series riddle?