Eggs are quite common in my kitchen and each of my family member loves egg especially our daughter. Almost every day she prefers her egg to be 7- minute boiled. I will tell you why 7 minutes boil. Boiling an egg for 7 minutes gives a barely set yolk and she loves this soft-boiled egg. Boiling an egg for 5 minutes gives a runny yolk though. If you prefer a hard-boiled egg then you should boil the egg for 8 to 10 minutes.