Lucia is a wonderful grandmother. her age is between 50 and 70.each of her sons have as many sons as they have brothers. their combined number gives lucia?s age. what is the age?
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Answered by
6
If the brothers are x
The number of sons = (x -1)x = x² - x
The total number = x + x² - x
= x²
A perfect square that lies between 50 and 70 is 64
So Lucia (The grandmother) is 64 years old
NOTE:
x² = 64
x = 8
There are 8 brothers each with 7 sons
One of the brothers will say that he has 7 brothers and 7 sons
The number of sons = (x -1)x = x² - x
The total number = x + x² - x
= x²
A perfect square that lies between 50 and 70 is 64
So Lucia (The grandmother) is 64 years old
NOTE:
x² = 64
x = 8
There are 8 brothers each with 7 sons
One of the brothers will say that he has 7 brothers and 7 sons
Answered by
2
Answer:
Step-by-step explanation:
If the brothers are x
The number of sons = (x -1)x = x² - x
The total number = x + x² - x
= x²
A perfect square that lies between 50 and 70 is 64
So Lucia (The grandmother) is 64 years old
NOTE:
x² = 64
x = 8
There are 8 brothers each with 7 sons
One of the brothers will say that he has 7 brothers and 7 sons
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