Has anyone increased their digit-span through practice?

Question

What are the best techniques to increase your digit span?

Does it increase your intelligence and IQ?

Answer 1

i found a site that help you a lot

http://www.mypianoworld.com/

Answer 2

You can take typing or piano lessons to find out for yourself, if you have the inclination; if you stick with it you'd have gained in intelligence as you'd have a new skill . . . . but reading is a much better way to get smarter!