Question

find the largest number thatr will divide 398, 436 and 542  leaving remainders 7,11 and 15

Answer 1

398-7=391=17*23
436-11=425=17*25
542-15=527=17*31
hence the largest number is 17.

Answer 2

we can write 398-7=391 436-11=425 542-15=527 these all no. r divide by 17 leaving 7 11 15 reminder