Shift-left Array Values - How To Assign Divisors Indexes To Start

I am writing a program for a game. It is between the user and a virtual player. The game starts with a pool of consecutive integers 1-100. The size of the pool is based on a random generated number at the beginning of the game. At the start, both players' scores are 0. For each turn, the player picks one number from the pool. That value is added to the player's score, the computer gets the sum of all the remaining numbers in the pool that divide evenly into the player's pick. The player's pick and its divisors are then removed from the pool.

The player should be able to play the game as many times as she wants without ending the program. Instructions should appear on the screen only once at the start of the program.

For each turn, both players' current score, the current pool of numbers, and a prompt for a number to be entered should show onscreen. I have written the code until I get to the function that updates the pool of numbers after a turn.

import java.util.Scanner;
import java.util.Random;
public class SlickPick {
public static void main (String[] args){
Scanner read = new Scanner(System.in);
int []pool = new int[100];

[Code] ....

My thinking is that I need to use the binary search to find the indexes of the divisors array and then use those indexes as the start values. I'm not sure how to assign the divisors indexes to start. Do I need an array for start? Whenever I run the program, the only value missing is 3.

//Name : poolUpdate
//Description : This function modifies the contents of the pool as a result of a turn of play.
//Parameters : The pool array, the divisors array, the size, and the user's pick.
// :
//Return :
public static void poolUpdate(int[] pool, int[] divisors, int size, int pick){
int low=0;
int high=size-1;

[Code] ....