'Know' in the Bible

And of the children of Issachar, men that had understanding of the times, to know what Israel ought to do, the heads of them were two hundred; and all their brethren were at their commandment.

And David said to Joab and to the princes of the people, Go, number Israel from Beer-sheba even to Dan; and bring me word, that I may know the sum of them.

And thou, Solomon my son, know thou the God of thy father, and serve him with a perfect heart and with a willing mind; for Jehovah searcheth all hearts, and understandeth all the imaginations of the thoughts: if thou seek him, he will be found of thee; but if thou forsake him, he will cast thee off for ever.

I know also, my God, that thou triest the heart, and hast pleasure in uprightness. As for me, in the uprightness of my heart I have willingly offered all these things: and now have I seen with joy thy people, that are present here, offer willingly unto thee.