Context: The game started off as a defensive battle for both teams with the first score of the game coming late in the 1st quarter. The Bengals originally went for a 32-yard field goal, but a holding penalty made it a 42-yard attempt for Mike Nugent. With the kick good, Cincinnati took a 3-0 lead with 1:33 left in the 1st. The Texans responded on their next possession with a 22-yard field goal from Nick Novak early in the 2nd to tie the game 3-3. To close out the first half, a Hail Mary pass by Texans' quarterback Brian Hoyer was intercepted in the end zone for no return. In a defensive first half, the Bengals led 6-3 at halftime. Hoyer left the game late in the 3rd quarter to be checked for a possible concussion; with Hoyer leaving T. J. Yates played his first snap for the Texans since 2013. The Texans scored the firstand onlytouchdown of the game early in the 4th quarter with Yates throwing 22 yards to DeAndre Hopkins. With Novak making the PAT, the Texans took a 10-6 lead with 14:20 left to play. In the end, the Texans held on to upset the Bengals 10-6, handing the Bengals their first loss of the season.

Question: How many points did Bengals lead with by halftime?

Answer:
3