SELECT
    co.continent_code,
    (SELECT
            cr.currency_code
        FROM
            currencies AS cr
                INNER JOIN
            countries AS cou ON cou.currency_code = cr.currency_code
        WHERE
            co.continent_code = cou.continent_code
        GROUP BY cr.currency_code
        ORDER BY COUNT(cr.currency_code) DESC
        LIMIT 1) AS most,
    (SELECT
            count(cr.currency_code)
        FROM
            currencies AS cr
                INNER JOIN
            countries AS cou ON cou.currency_code = cr.currency_code
        WHERE
            co.continent_code = cou.continent_code
        GROUP BY cr.currency_code
        ORDER BY COUNT(cr.currency_code) DESC
        LIMIT 1) AS number_of_currencies
FROM
    continents AS co
        INNER JOIN
    countries AS c ON c.continent_code = co.continent_code
        INNER JOIN
    currencies AS cu ON c.currency_code = c.currency_code
GROUP BY most
HAVING number_of_currencies > 1
ORDER BY co.continent_code ASC , most ASC;