Thread: convert a base

Can someone please help me with the following:

Convert:

a.) 213 base 5 to base 10

b.) 15 base 10 to base 5

c.) 132 base 4 to base 10

d.) 8 base 10 to base 4

My answers:

a.) 58

b.) 30

c.) 31

d.) 20

And then I have to do the following:

1.) (22+44)_5 = ?

2.) (32-14)_5

I said:

1.) 71

2.) 12

Can someone please confirm?

Hello,

Originally Posted by DiscreteW

Can someone please help me with the following:

Convert:

a.) 213 base 5 to base 10

b.) 15 base 10 to base 5

c.) 132 base 4 to base 10

d.) 8 base 10 to base 4

My answers:

a.) 58

Yes

b.) 30

Yes

c.) 31

Hmmm I get 36, please check it ^^

d.) 20

Yes

And then I have to do the following:

1.) (22+44)_5 = ?

2.) (32-14)_5

I said:

1.) 71

No, but not far. When in base 5, the digit number must not exceed 4.
So 7=5+2 is transformed into 12.

2.) 12

Hmm... I think there is a difference here :
you're not asked for (32)_5 - (14)_5 (which result is 13, not 12), but for (32-14)_5, that is to say (18)_5 = (23)_5



If you do not agree, tell me

Originally Posted by Moo

No, but not far. When in base 5, the digit number must not exceed 4.
So 7=5+2 is transformed into 12.

Hmm... I think there is a difference here :
you're not asked for (32)_5 - (14)_5 (which result is 13, not 12), but for (32-14)_5, that is to say (18)_5 = (23)_5

confused on these parts.

So you're saying the answer is (121)_5 for the first...

for the second, how is (18_5) = (23)_5?

Originally Posted by DiscreteW

confused on these parts.

So you're saying the answer is (121)_5 for the first...

yes

for the second, how is (18_5) = (23)_5?