Guinnes record/ math

Where does the biggest dog ever live?

What is the name of the person that has the record of the smallest waist?

How many centimeters does Cathie Jungs waist measure(uncorsetted)?

What is the name of the tallest dog ever?

How many meters does Zeus measure?

Sofia has 4 apples more than Mariana, Mariana has 3 apples more than Isabella and Isabella has 8 apples. How many apples does Sofia have?

You have to swim 2 times round a 300-metre pool. How do you work out how far you have to swim?

Daniela bougth 8 guayabas. She payed in total $26.00 dollars. How much did each guayaba cost?

In a classroom there's 20 students and the teacher has 100 candies.Each student must have the same amount of candies. How many candies must each student receive?

Camila is 8 years younger than her sister Laura. Laura's friend is 3 years older than Laura. Laura's friend is 18 years old. How old is Camila?