What question can you never answer yes to?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Why Aeroplane windows are round?

Solve this riddle by finding the odd one out from the rest.

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Five lovely ladies(Sophia, Isabella, Madison, Emma and Olivia) planned a picnic.

They each buy one thing each for the picnic.

Sophia, Emma and Olivia got a drink : orange-Juice, apple-juice, and mango-juice.
Olivia got the drink with the same letter as the one in her first name.
Emma loves mango-juice.
The other two bring some food : chocolates and pizza.
Also Madison is allergic to cheese.

So which ladies bought what ?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

What's the only room from which no one can enter or leave

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?