New Living Translation
Jesus knew immediately what they were thinking, so he asked them, “Why do you question this in your hearts?

American Standard Version
And straightway Jesus, perceiving in his spirit that they so reasoned within themselves, saith unto them, Why reason ye these things in your hearts?

Berean Study Bible
At once Jesus knew in His spirit that they were thinking this way within themselves. “Why are you thinking these things in your hearts?” He asked.

Douay-Rheims Bible
Which Jesus presently knowing in his spirit, that they so thought within themselves, saith to them: Why think you these things in your hearts?

English Revised Version
And straightway Jesus, perceiving in his spirit that they so reasoned within themselves, saith unto them, Why reason ye these things in your hearts?

King James Bible
And immediately when Jesus perceived in his spirit that they so reasoned within themselves, he said unto them, Why reason ye these things in your hearts?

World English Bible
Immediately Jesus, perceiving in his spirit that they so reasoned within themselves, said to them, "Why do you reason these things in your hearts?

Young's Literal Translation
And immediately Jesus, having known in his spirit that they thus reason in themselves, said to them, 'Why these things reason ye in your hearts?

Mark 2:8 Additional Translations ...