Alex buys three bags of marbles.
The marbles are priced differently.
How much does he pay for black and gray marbles?
My scale is imprecise if the weight is less than 5 kg.
I with my bag weigh 41 kg.
I without bag weigh 38 kg.
What is the weight of my bag?
Forty young people participated in a competition.
Half of them were eliminated on the first day of the competition and 12 on the second day.
How many participants were left at the start of the third day?
A building is 28 meters high. A flagpole on top of it is 7 meters tall.
How high is the top of the flagpole from the ground?
The picture shows the Federal Supreme Court of Switzerland.
When the car wheels make one full rotation the car moves forward by about 2 meters.
How far will the car move forward after 9 rotations?
Jane hikes in a group of alpinists.
She is the third in the line.
How many alpinists are behind her?