If eleven plus two equals one, what does nine plus five equal?

John Went to the nearby store in a Mall to buy something for her home. Below is the conversation between the two:

John: How much for the one?
Shopkeeper: It is $2
John: How much for the Eleven?
Shopkeeper: It is $4
John: How much for the Hundred?
Shopkeeper: It is $6.

What is John buying?

We can be boring,Or interesting.
We can be long,Or short.
We can have pictures,Or just words.
Many love us,But many also hate us.
What are we?

Can you write down eight eights so that they add up to one thousand?

Can you count the number of squares in the figure below?

Replace the question mark with the correct number below.

Can you tell a 3D object that has just two surfaces?

If six children and two dogs were under an umbrella, how come none of them got wet?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

Identify The phrase in the picture.