2022 AMC 8 Problem 5

Below is the professionally curated solution for Problem 5 of the 2022 AMC 8, from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2022 AMC 8 solutions, or check the answer key.

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Concepts:ageslinear equation

Difficulty rating: 720

5.

Anna and Bella are celebrating their birthdays together. Five years ago, when Bella turned 66 years old, she received a newborn kitten as a birthday present. Today the sum of the ages of the two children and the kitten is 3030 years. How many years older than Bella is Anna?

11

22

33

44

55

Solution:

If Bella was 66 five years ago, then she is 1111 right now.

If the kitten was a newborn five years ago, then it is 55 right now.

Since the sum of all 33 ages is 30,30, Anna's age is 30511=1430-5-11 = 14

Since Anna is 1414 and Bella is 11,11, she is 33 years older than Bella.

Thus, the correct answer is C.

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