← Doubling and Halving Cards you don't know will reappear later

You should create an account to save your progress. It only takes a minute!
new card

24 x 500

Click to see back →
new card

24 x 500

12,000

Half 24 to 12, and double 500 to 1000. Then, 24(500) = 12(1000) = 12000.

I knew this card I didn't know this card
You have mastered 0 out of 20 cards
You are reviewing 0 out of 20 cards
You are learning 0 out of 20 cards

Have feedback about this card? Please email help@magoosh.com