← 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 525

Click to see back →
new card

24 x 525

12,600

Half 24 to 12, and double 525 to 1050. Then, half 12 again to 6, and double 1050 again to 2100. Then, 24(525) = 12(1050) = 6(2100) = 12600.

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