The order guitars and violins are strung in differs
This one is a little more difficult. Guitar strings are typically strung in order of low E, A, D, G, B, then high E. A perfect fourth (i.e. the interval between C and F) exists between each note (although the interval between G and B only is narrower [major third]). A ukulele is a four-stringed instrument, with its strings corresponding to strings 1 through 4 on a guitar. However, even though violins are also stringed instruments, their strings are strung in order (from low to high) of G, D, A, and E. This is the exact opposite order of strings 3 through 6 on a guitar, with a perfect fifth (i.e. the interval between C and G) between each note. This is because violins are played completely differently from guitars, which are fingered. Incidentally, mandolins (which have eight strings) are strung with four groups of two strings, with each pair having the same thickness and pitch. These instruments have the same note intervals as violins.