Question

Sam has 585 books. He wants to stack them so that he can lend them to his mates. He can make stacks with equal number of books in each.

• A. 2
• B. 4
• C. 10
• D. 5

Answer 1

The correct option is D 5

Given : Sam has 585 books.

We know: For a number to be evenly divisible by 10, last digit of the number should be "0".
For a number to be evenly divisible by 5, last digit of the number should be "0" or "5".
For a number to be evenly divisible by 2, last digit of the number should be even number.
For a number to be evenly divisible by 4, last two digits of the number should be divisible by 4.

$\therefore$ 585 is evenly divisible by 5 because its last digit is "5"

Sam can divide 585 books into 5 equal stacks.