![](http://www.alamy.com/thumbs/6/07B285D4-5226-4083-BB07-88D2BE7DD78F/2CTYKG6.jpg)
3d rendering blue question mark with red question mark
Size: 5500px × 3667px
Photo credit: © Kittipong Jirasukhanont / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: 3d, banner, blue, challenge, confuse, contest, exam, examinor, faq, game, icon, illustration, letters, mark, problem, query, question, questioner, quiz, quizzer, red, rendering, sign, symbol, test, thinking