Problems
Here are 5 tasks. Keyboard input: you will need to enter one or several values as the answer.

Family age
The combined age of a family of four is 68, and four years ago it was 53. How old is the youngest family member? 👶
60 rubles
Vanya has as many 2-ruble coins as he does 10-ruble coins. All the coins together are worth 60 rubles. How many 2-ruble coins does Vanya have? 💰
250%
If X is 250% of Y, what percentage of X is Y?
Students and a bunch of candy
Three students had a small pile of candies. They divided it into three equal parts. After each of them ate four candies, they had as many candies between them as each had after the division. How many candies did the students have before dividing them?🍬
Two motor ships
Two motorboats left their ports at the same time and are traveling toward each other at constant speeds. One motorboat is traveling at 20 km/h, and the other at 30 km/h. How far apart will they be exactly one hour before they meet? 🚢