Recent Riddles & Brain Teasers

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

If 21x = 79x, what is the value of x?

Who can jump higher than a Mountain?

What's the next in the series?

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

When can we add 2 to 11 and get 1 as the correct answer?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

When we see 2 but call 10?