Question

A group of cubes are arranged in a pattern with the same number of cubes in each row and column. There are 225
cubes in the shape. How many cubes are in one row?
A)
15
B)
25
0
56
D)
75

Answer 1

Given:

Total number of cubes = 225

Cubes are arranged in a pattern with the same number of cubes in each row and column.

To find:

The number of cubes in a row.

Solution:

Let the number of cubes in a row be x.

Since, cubes are arranged in a pattern with the same number of cubes in each row and column, therefore number of cubes in rows and columns are equal.

$\text{Total cubes}=x\times x$

$\text{Total cubes}=x^2$

Total number of cubes = 225

$x^2=225$

Taking square root on both sides.

$x=\sqrt{225}$

$x=15$

So, the number of cubes in a row is 15.

Therefore, the correct option is A.