Change the representation of 1025 from base five to base ten.

### A good answer might be:

1025 = 1 × 5102 + 0 × 5101 + 2 × 5100 = 2510 + 210 = 2710

# Base Seven

Here is another example: 3267. This means:

    3×seven2 + 2×seven1 + 6×seven0

To write the number in decimal, write the powers of seven in decimal and perform the arithmetic:

    3 ×  7102 + 2 × 7101 + 6 × 7100

    3 × 4910  + 2 × 710 + 6 × 1

    14710 + 1410 + 610    =    16710.

### QUESTION 10:

Can 6827 be rewritten in base ten notation?