Limestone could be made in a cave dark like setting and debris from crevices in the cave can build it up.while halite and conglomerate are found usually near water gathers whether large or small and builds up from there
54289 = 233^2
You know the last digit of the squared number is 3 or 7, so just try numbers ending with those from 220 to 250
I mean put in the work to get your questions answered fast
