Question

Дед старше внука на 47 лет. Когда внуку было 25 лет, у него родился сын. Во сколько раз прадед будет старше правнука, когда тому исполнится 3 года? С ответом пожалуйста!

Answer 1

1)25+47=72(г.)
2)72+3=75(л.)
3)75:3=25(р.)
В 25 раз

Answer 2

Problem Analysis

To solve this problem, we need to determine the age difference between the great-grandfather (pradeda) and the great-grandson (pravnuk) when the great-grandson turns 3 years old. We are given that the grandfather is 47 years older than the grandson and that the grandson had a son when he was 25 years old. We need to calculate the age difference between the great-grandfather and the great-grandson when the great-grandson turns 3 years old.

Solution

Let's break down the problem step by step:

1. We are given that the grandfather is 47 years older than the grandson. Let's denote the age of the grandson as x. Therefore, the age of the grandfather is x + 47.

2. We are also given that the grandson had a son when he was 25 years old. This means that the age of the grandson's son is 25 - x.

3. We need to find the age difference between the great-grandfather and the great-grandson when the great-grandson turns 3 years old. Let's denote the age of the great-grandson as y. Therefore, the age of the great-grandfather when the great-grandson turns 3 years old will be (x + 47) + (y - 3).

To find the age difference, we subtract the age of the great-grandson from the age of the great-grandfather:

Age difference = [(x + 47) + (y - 3)] - y

Simplifying the expression:

Age difference = x + 47 + y - 3 - y

The y terms cancel out, and we are left with:

Age difference = x + 47 - 3

Simplifying further:

Age difference = x + 44

Therefore, the age difference between the great-grandfather and the great-grandson when the great-grandson turns 3 years old is x + 44.

Answer

The age difference between the great-grandfather and the great-grandson when the great-grandson turns 3 years old is x + 44. The value of x represents the age of the grandson.