What is so fragile that saying its name breaks it?

Can you make four (4) nines (9) equal 100?

What does this rebus mean?

O
N
C
E
TIME

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

Replace the question mark with the correct number in the below-given picture?

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

How many letters are in the alphabet?

Replace the question mark with the number below given a simple math problem.