Hex - how many in the series 000 through to FFF? [closed] - hex

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I am trying to find out how many combinations are possible for 000 through to FFF under hex format? thanks

There are 16 choices for each of the 3 digits, so:
16*16*16 = 4096

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Find maximum of two variables in R [closed]

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I have this R code, and i want to assign to the Max Variable the maximum value of A and B
, would be something like :
Max<-(A,B)
How can i do it in R?
I searched but i couldn't find a max function.
Thanks
The function is literally max:
Max <- max(A, B)

How to replace vector occurring numbers? [closed]

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Let's say I have a vector of 10 elements called numbers in R
numbers <- c(0,1,1,1,0,0,1,0,1,0)
and I want to replace each occurrence of 1 to 5?
this should work
v[v==1]<-5

How to compute N number of Pi [closed]

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I have found this formula for computing Pi value:
But I need to compute only(for example - 1000th) number of Pi value. How I can do it with provided formula?
Thanks.
What you want is called a "spigot algorithm". Take a look at [1] in the section "BBP digit-extraction algorithm for pi". Good luck and have fun.
[1] http://en.wikipedia.org/wiki/Bailey%E2%80%93Borwein%E2%80%93Plouffe_formula

How do we get the remainder in division arithmetic for computer architecture? [closed]

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I am learning binary division following the step-by-step procedure. I am stuck at Step One Repeat One in the remainder section. To get the remainder, the formula is Remainder = Remainder - Divisor.
How do we get to remainder: 11100110? I just don't understand how we have 1110 on the left half of the register. Any guides or help would greatly be appreciated!
Thanks:
The example is 10/5 using an 8 bit ALU.
I have attached a picture of the example for reference

A combinatorics question [closed]

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In how many different ways can a cube be painted by using three different colors of paint?
The answer of this is 45,
What if I change cube to cuboid?
Thanks!
I am preparing for job interview and this question is from CareeCup.
First, you should know how 45 is derived. That is by the use of permutation and combination.
Since a cuboid has the same number of sides as a cube, they should have the same answer. So the answer is 45.
But it is important to learn how the 45 is derived.

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