The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Jack was having a candle light dinner with his girlfriend. Suddenly a cold gush of wind entered through the open window and three of the ten candles were extinguished. Assuming that none of the other candles were extinguished.

How many candles are they left with in the end ?

On a magical land of Mexico , all the animal in the land are rational.

There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).

If we leave them for some time then how many goat and tiger will be there , when we come back ?

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

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

Look at the picture and find out which square is not linked with any of the other squares.

Solve the mathematical equation in the picture below.

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

Can you spot the man between the coffee bean in the picture below ?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?