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.

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

what does this below rebus represent identXQQQQQME

I look at you, you look at me I raise my right, you raise your left. What am I?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?