Applying a script to two objects not working

Questions & Answers
1

In short, I’ve got these blocks which, when collided with, generate a random + or - problem e.g 2 - 5. Now I originally only had one of these blocks in the first level but other levels will need more than one. I have been working for hours trying to find a way to allow blockade 1 and 2 to be able to be affected by the script. Once the question is answered correctly, the blockade will be destroyed allowing the player to continue. Here is the code:

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using UnityEngine.SceneManagement;

public class Collisions : MonoBehaviour
{
    public GM gm = new GM();
    private int N1;
    private int N2;
    private int AnswerCorrect;
    public Text inputfield;
    public Text QuestionBox;
    public GameObject QuestionPanel;
    string opperand;
    public GameObject Blockade;
    public GameObject Blockade2;
    public GameObject Enemy;
    public KeyCode Submit;

    void Update()
    {
        if (Input.GetKey(Submit))
        {
            CheckAns();
        }
    }
    public void QuestionMaker()
    {
        string myOperator = GetRandomOperator();

        QuestionBox.text = "What is " + N1 + myOperator + N2 + "?";
    }
    public string GetRandomOperator()
    {

        int randomOperator = Random.Range(0, 2);

        N1 = Random.Range(1, 10);
        N2 = Random.Range(1, 10);

        switch (randomOperator)
        {
            case (0):
                opperand = "-";
                AnswerCorrect = N1 - N2;
                break;
            case (1):
                opperand = "+";
                AnswerCorrect = N1 + N2;
                break;
        }
        return opperand;
    }

    
    public void CheckAns()
    {

        if (inputfield.text == AnswerCorrect.ToString())
        {
            Destroy(Blockade);
            QuestionPanel.SetActive(false);
        }
        else
        {
            QuestionMaker();
        }
    }
    void OnCollisionEnter2D(Collision2D col)
    {
        if (col.gameObject.name == "End")
        {
            Scene scene = SceneManager.GetActiveScene();
            SceneManager.LoadScene(scene.buildIndex + 1);
        }
        if (col.gameObject.name == "Blockade")
        {
            QuestionPanel.SetActive(true);
            QuestionMaker();
            GetRandomOperator();
            CheckAns();
        }
        if (col.gameObject.name == "Blockade2")
        {
            QuestionPanel.SetActive(true);
            QuestionMaker();
            GetRandomOperator();
            CheckAns();
        }
    }
}

I am well aware that this will not work because I removed all the things I tried so that whoever replies may have a crack at it. Thank you.

2

You need to put it in the function declaration of CheckAns, that way you can use a GameObject parameter for CheckAns()

public void CheckAns(GameObject blockade)
{
              
//your block of code

}

This way you pass whichever blockade is asking the question as an argument, if the answer is right it destroys the blockade which was passed as a GameObject Reference