What is so fragile that saying its name breaks it?

There is something which you can be arrested for attempting but not for successfully completing.

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

What work can one never finish?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

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 ?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

Which letter of the alphabet has the most water?