How hard is it to get six-pack abs to show?

How rare are visible six-pack abs?

Do 12-pack abs exist?

Are six-pack abs workouts once a week enough to make them visible?

At what body fat percentage do veins show?

Should I do more reps or weight for six-pack abs to show?

Can an 18-year-old guy get visible six-pack abs?

Is 30 minutes of six-pack abs enough?

What are the differences between female and male six-pack abs?

Do skinny guys have V lines?