A general wishing to draw his $17429$ men in the form of a solid square found that he had $5$ men over. The number of men in the front row was: $174$ $424$ $132$ $742$

$21$ mango trees, $42$ apple trees and $56$ orange trees have to be planted in rows such that each row contains the same number of trees of one variety only. Minimum number of rows in which the above trees may be planted is : $3$ $15$ $17$ $20$