adjective agreement with de lo más ( emphasis)

Question

nos sentamos en una banqueta, de lo más felices mientras la música....In the lesson on emphasis all the examples use a masculine singular adjective ( I put de lo más contento ) but was marked wrong. Is it really wrong?Gracias

Silvia Piriz · Accepted Answer

Hola David L.
Thanks for pointing this out! You're absolutely correct.
The use of "de lo más" can indeed keep the adjective in its base, gender-neutral form, as shown in the examples from the lesson, such as "Esas chicas son de lo más hortera" and "Tus gemelos son de lo más adorable".
In this construction, it is acceptable for the adjective not to agree in number and gender with the subject. This allows phrases like "de lo más contento" to be grammatically correct, even if the subject is plural. There is some flexibility with this structure, and we recognize that your answer aligns with this usage.
We will add your answer as a valid option in the exercise to avoid confusion in the future.
Thank you for your keen observation!
Saludos,
Silvia