| Name | Age when son was born | Age at death |  | 
                                    
                                    | Adam | 130 | 930 |  | 
                                    
                                    | Seth | 105 | 912 |  | 
                                    
                                    | Enosh | 90 | 905 |  | 
                                    
                                    | Kenan | 70 | 910 |  | 
                                    
                                    | Mahalalel | 65 | 895 |  | 
                                    
                                    | Jared | 162 | 962 |  | 
                                    
                                    | Enoch | 65 | 365 | No Death | 
                                    
                                    | Methusala | 187 | 969 |  | 
                                    
                                    | Lamech | 182 | 777 |  | 
                                    
                                    | Noah | 500 | 950 |  | 
                                    
                                    | Shem | 100 | 500 |  | 
                                    
                                    | Arphaxad | 35 | 438 |  | 
                                    
                                    | Shelah | 30 | 433 |  | 
                                    
                                    | Eber | 34 | 464 |  | 
                                    
                                    | Peleg | 30 | 239 |  | 
                                    
                                    | Reu | 32 | 239 |  | 
                                    
                                    | Serug | 30 | 230 |  | 
                                    
                                    | Nahor | 29 | 148 |  | 
                                    
                                    | Terah  | 70 | 205 |  | 
                                    
                                    | Abram |                                           100 | 175 |  | 
                                    
                                    | Isaac | 60 |  |  | 
                                    
                                    | Jacob |  | 180 |  | 
                                    
                                    | Judah |  |  |  | 
                                    
                                    | Perez |  |  |  | 
                                    
                                    | Hezron |  |  |  | 
                                    
                                    | Ram |  |  |  | 
                                    
                                    | Amminadab |  |  |  | 
                                    
                                    | Nahshon |  |  |  | 
                                    
                                    | Salmon |  |  |  | 
                                    
                                    | Boaz |  |  |  | 
                                    
                                    | Obed |  |  |  | 
                                    
                                    | Jesse |  |  |  | 
                                    
                                    | King David |  |  |  | 
                                    
                                    | Solomon |  |  |  | 
                                    
                                    | Rehoboam |  |  |  | 
                                    
                                    | Abijah |  |  |  | 
                                    
                                    | Asa |  |  |  | 
                                    
                                    | Jehoshaphat |  |  |  | 
                                    
                                    | Jehoram |  |  |  | 
                                    
                                    | Uzziah |  |  |  | 
                                    
                                    | Jotham |  |  |  | 
                                    
                                    | Ahaz |  |  |  | 
                                    
                                    | Hezekiah |  |  |  | 
                                    
                                    | Manasseh |  |  |  | 
                                    
                                    | Amon |  |  |  | 
                                    
                                    | Josiah |  |  |  | 
                                    
                                    | Jeconiah |  |  |  | 
                                    
                                    | Shealtiel |  |  |  | 
                                    
                                    | Zerubbabel |  |  |  | 
                                    
                                    | Abiud |  |  |  | 
                                    
                                    | Eliakim |  |  |  | 
                                    
                                    | Azor |  |  |  | 
                                    
                                    | Zadok |  |  |  | 
                                    
                                    | Akim |  |  |  | 
                                    
                                    | Eliud |  |  |  | 
                                    
                                    | Eleazar |  |  |  | 
                                    
                                    | Matthan |  |  |  | 
                                    
                                    | Jacob |  |  |  | 
                                    
                                    | Joseph |  |  |  | 
                                    
                                    | Jesus |   |   |  | 
 
                                     
                                    Now, if you add all the ages from Adam to Isaac when they had their son, you get 2,106 years. 
                                    Now, there are  38 others who I haven't put the ages in yet.  So lets just say the average age would've been
                                    50 years (it was prabably younger in my opinion) 
                                    Because 50 x 38= 1,900, and 2,106+ 1,900= 4,006, and considering christ was born around  2,011 years ago, the earth
                                    should be about 6017years old.  
                                    Most Young Earth creationists put it at around 6,000, but close enough.
                                     
                                    References in the Bible for above geneology:
                                    Genesis 5; Genesis 11:10-32 Genesis 21:5; Genesis 25;