One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Which country gets ill every time?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

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 ?

What has 13 hearts but no other organs?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Astrology starts with the alphabet A, Biology starts with B, Psychology with P and Limnology with L.

Can you find an "ology" that begins with a P?

Why is the Hole below a Lock?

It belongs to you, but other people use it more than you do. What is it?