Quite a few
Usually 4. (Viola, Violin, Cello, Bass).
6.
Depends on the instrument.
4
The number of strings on stringed instruments varies widely by type. For instance, a standard violin typically has four strings, while a guitar usually has six. Instruments like the cello and double bass also have four strings, while the harp can have anywhere from 30 to over 40 strings, depending on the model. Other instruments, like the sitar, can have more than a dozen strings, including sympathetic strings for resonance.
This varies from instrument to instrument - eg Guitar 6, Violin 4, Zither 34, Bandurria 12.
The number of strings on a stringed instrument varies widely depending on the type. For example, a standard guitar typically has six strings, while a violin has four. Instruments like the harp can have multiple strings, sometimes exceeding 40, and the double bass usually has four strings, though some versions have five. Overall, the number of strings can range from one to over 40, depending on the instrument.
A sitar produces a unique sound that is created by its many strings being simutaniously strummed. The sound can be very high pitched and is usually "buzzy" or has a "springy" effect to it. This effect is called jiwari. They are many styles of tuning a sitar and alter its jiwari and each is slightly different. The buzzy effect of the many sympathetic or resonating strings seems as if it is background music to the more prominant playable strings that sound more like plucking a wire. This sound is very lush and warm. It does not sound like any Western stringed istrument.
Only the string holding the price tag. The sax is not a stringed instrument.
Orchestral string instruments all use 4 strings.
A Bajo de uñas is an instrument that can have between 4 and 6 strings and is comparable to the double bass. The four stringed version of the instrument is much more common than the 6 stringed variety.