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.

The cream is heavier than Milk. True or False?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

I am quite hot but become too cold if you remove the first two letters. What am I?

There is something which is always coming but never arrives?

What has 13 hearts but no other organs?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

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

Can you make a six-letter word using the letters N, A and B ?