a no. when divided by 342 gives remainder 47. What wld b he no. when the same no. is divided by 19.?

Start with the simplest case: 389/342 = 1 with remainder 47
389/9 = 20 with remainder 9

Then: 731/342 = 2 with remainder 47
731/19 = 38 with remainder 9

Then 1073/342 = 3 with remainder 47
1073/19 = 56 with remainder 9

Then 1415/342 = 4 with remainder 47
1415/19 = 74 with remainder 9

And more generally 47/19 gives a remainder of 9.