Question

Let [n] represent the greatest even integer less than n that divides n, for any positive integer n. For example, [24] = 12. What is the value of [20]

Answer 1

10?

Answer 2

this is a SAT question, so i guess is not that easy

Answer 3

soo n = 20
and 10 is less than 20, it divides 20, and is a positive and even integer
theres no other number greated that 10 that can divide 20

Answer 4

okay thanks~