It's the sort of thing your group finds challenging.

I'll find that challenging, interesting, and probably quite difficult.

It's more an exercise they find challenging, and perhaps even fun.

Bebb is paying this off at a rate of £33 a month, which he often finds very challenging.

All modules are in the form of games that adults, but not necessarily their children, may find challenging.

"What exactly about this project do you find so challenging?"

Students, too, are sometimes offended when courses they like - and find challenging - become known as guts.

Try out in a familiar, low-risk situation the suggestions that you find most challenging.

There are a number of hill climbs on the race that the riders will find quite challenging.

"I find this much more challenging than shopping in a mall," she said.