A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?

Count the number of triangles in the below picture?

The Little ant seems to be always confused. Do you know why?

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

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?