Ok...having trouble with this one...
Find the sum of all seven-digit numbers that can be written using only ones and zeros.
I'm guessing this can be done using exponents, however we have not gotten into this yet in class so I am having trouble. Only thing I'm coming up with is writing them all out and adding them up. Isn't there an easier way?
Find the sum of all seven-digit numbers that can be written using only ones and zeros.
I'm guessing this can be done using exponents, however we have not gotten into this yet in class so I am having trouble. Only thing I'm coming up with is writing them all out and adding them up. Isn't there an easier way?