There is a 6 digit number consisting of the digits: 1, 1, 2, 2, 3 and 3. the 1's are one digit apart, the 2's are two digits apart and the 3's are three digits apart. what is the number?

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?

Corresponding angles are a. always b. sometimes c. never congruent