Japan and its alarm clocks. Most of these devices force you to wake up through an extra-annoying noise (or by moving away from you), but this new one, the so-called Twist Alarm Clock [JP], makes you solve (simple) math problems.

The way it works is that when the alarm starts ringing in the morning, the clock uses its two displays and two rotatable parts to create a math problem, for example 8+2=?. It won’t stop ringing until you give it the right answer. 5-4=2, as seen in the picture above, won’t work. Maker D-Forme says the main idea behind their clock is to force buyers to activate their brains in the morning.

Sized at 13.5×6.3×7cm, the Twist Alarm clock is available only in Japan (price: $30). If you’re interested, I’d suggest contacting import/export specialists like Japan Trend Shop, Geek Stuff 4 U or Rinkya.