Nina has 20 seashells, and she needs to display them in rows with equal number of seashells in each row.
She wants to know what are the different possible ways to do that
This is a problem of factorization. We need to determine all the factors for the number of seashells she has
Factorizing 20:
20 = 1 × 2 × 2 × 5
Now, dividing 20 by each factor, we will get to know the possible ways in which she can arrange the seashells
Starting with the smallest factor, i.e. 1 and moving on to larger factors
20 ÷ 1 = 20. So she can have 1 row, with 20 seashells
20 ÷ 2 = 10. She can have 2 rows, with 10 seashells in each row
20 ÷ 4 = 5. She can have 4 rows, with 5 seashells in each row
20 ÷ 5 = 4. She can have 5 rows, with 4 seashells in each row
20 ÷ 10 = 2. She can have 10 rows, with 2 seashells in each row
20 ÷ 20 = 1. She can have 20 rows, with 1 seashell in each row
So there are total of 6 ways to arrange the seashells.