If President Trump wants to have an IQ test showdown with his own secretary of State, late-night host Jimmy Kimmel says he should put it on pay-per-view.

The ABC host joked that he would pay $100 to see Trump take on Rex TillersonRex Wayne TillersonThe Hill's 12:30 Report Trump will declare North Korea a state sponsor of terror Tillerson condemns violence against LGBT people on Transgender Day of Remembrance MORE in a battle of the brains, though he also suggested the president would be a huge underdog.

“At this point I’m not sure Donald TrumpDonald John TrumpO’Malley tells Dems not to fear Trump Right way and wrong way Five things to know about the elephant trophies controversy MORE could finish the maze on the back of a Denny’s kid’s menu,” Kimmel said.

Trump told Forbes magazine in an interview published Tuesday that he and Tillerson should have an IQ test, and that he “can tell you who is going to win.”

Kimmel said the winner would have to be Tillerson.

“It has to be him, no intelligent person would get into an IQ contest with his own secretary of State," he said. "The next day, Kellyanne Conway would be on TV explaining that IQ tests are like golf — the lower the number, the better the score.”

The White House later said Trump was joking about the test.