My score script doesn't seem to work properly, score is not added properly

My score should increase by 10 with each right answer ,but it seems to remain static at 10 so please help me with with -

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 
 public class onClick1 : MonoBehaviour {
 
     public Text ScoreText;
     public int score;
     private int Count = 10;
 
     public bool hello;
     private float RightAnswer = 2.0f;
 
     void Start () 
     {
 
         score = 0;
         UpdateScore ();
 
         }
 
 
     public    void SayHello(  bool hello = false ) {
 
 
         
       if (GetComponent<Image> ().color == GameObject.FindGameObjectWithTag ("DisplayButton").GetComponent<Image> ().color) {
 
             GameObject thePlayer = GameObject.FindGameObjectWithTag("GameController");
             DisplayColor displayColor = thePlayer.GetComponentInChildren <DisplayColor>();
         
             ChangeColor[] changeColors = thePlayer.GetComponentsInChildren <ChangeColor>();
             
             foreach(ChangeColor changeColor in changeColors ) {
                 Debug.Log(changeColor .gameObject.name);
                 changeColor.ColorME();
             }    
 
 
             Timer timer = thePlayer.GetComponentInChildren<Timer>();
 
             
             hello = true;
             displayColor.changeColor();
             timer.myTime += RightAnswer;
 
             **AddScore();
             UpdateScore();**    
         
         
         } else if (GetComponent<Image> ().color != GameObject.FindGameObjectWithTag ("DisplayButton").GetComponent<Image> ().color) {
     
             hello = false;
 
         
 }
     
 
     
     }
 
 
     **public    void UpdateScore() {
         
         ScoreText.text = "Score: " + score;
         
     }
     
     public void AddScore( )
     {
         
         score += Count;
         UpdateScore ();
         
     }**