KJV - And when he was come into the house, his disciples asked him privately, Why could not we cast him out?

ASV - And when he was come into the house, his disciples asked him privately, `How is it' that we could not cast it out?

BBE - And when he had gone into the house, his disciples said to him privately, Why were we unable to send it out?

WEB - When he had come into the house, his disciples asked him privately, "Why couldn't we cast it out?"

YLT - And he having come into the house, his disciples were questioning him by himself -- `Why were we not able to cast it forth?'

Notes