Sunday Times Teaser 3089 – An Old Square
by Colin Vout
Published Sunday December 05 2021 (link)
Archaeologists have excavated an ancient area that has the shape of a perfect square. Fragmentary documents give some information about its measurements: the number of major units along a side is less than the remaining number of minor units; there is a whole number of minor units in a major unit (no more than 10); and the area is a certain number of square major units plus a remainder of 15 square minor units.
Expressed just in terms of minor units, how many are there along a side?