How to generate a random number that is evenly divisible by another randomly generated number

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I'm working on a simple math flashcards app using JavaScript and jQuery. The available operations are addition, subtraction, multiplication, and division, each of which have functions that use generateTop() and generateBottom() to assign values to HTML elements.

I'm having trouble figuring out how to use my division problem function to generate random numbers so that thetopNumber is evenly divisible by the bottomNumber. I'm using the following code to generate random numbers for each problem:

let topNumber = 0;
let bottomNumber = 0;

function generateTop(max, min){
  topNumber = Math.floor(Math.random() * (max - min) + min);
  return topNumber;
};

function generateBottom(max, min){
  bottomNumber = Math.floor(Math.random() * (max - min) + min);
  return bottomNumber;
};

Here is my current division problem generator:

function division(){
  problemTop.html(generateTop(1, 144));
  problemBottom.html(generateBottom(1, topNumber));
  opSym.html("÷");
}

I can adjust the max and min to get a positive integer for addition, subtraction, and multiplication problems but am stuck on how to ensure that I get a positive integer for division problems. I've tried messing with some different loop ideas but haven't gotten anything to work. I want to keep min at 1 and max at 144.

I've checked SO for solutions but can only find how to generate random numbers divisible by one other explicit, hard-coded number. How can I adjust my division function so that the topNumber can be divided evenly by the bottomNumber?


Just add a single if statement to make your function recursive:

function generateBottom(max, min) {
    bottomNumber = Math.floor(Math.random() * (max - min) + min);
    if (topNumber % bottomNumber) {
        generateBottom(max, min);
    }
    return bottomNumber;
}

What this does is it divides topNumber and checks if a remainder exists. If there is a remainder, it means the two do not divide, so it is recalculated. Otherwise, it returns bottomNumber as per usual.

Programming - Random Numbers, Other properties, such as no (predictable) relation between the current random Generating a sequence of random numbers is quite difficult because we want certain When choosing a numbers between 0 and 1000 we are equally likely to get any number. Matlabs random number generation function is called rand. Click on a worksheet cell where you want the random number to reside. Type the function =RAND () into the formula bar above the worksheet. Press the F9 key to change the RAND function into a static random number. Press the Enter key on the keyboard to display the random number into the selected cell.


Add a denomenator parameter to your generateTop function, and pass in the randomly generated "bottom" (denominator) number returned from generateBottom. Multiply the new random number created in generateTop by the denominator, and return that.

Generating random numbers in ProcessingJS (article), Learn how to generate random numbers in ProcessingJS using the random() function, and check their Typically we want to generate random numbers that are picked relatively evenly. You buy a bag of M&Ms to share with other students. Say the "another number" is K, and you want a random number X between 0 and N (inclusive) that is divisible by K. Then choose a random number Y between 0 and N/K and multiply it by K. #include <random> std::default_random_engine generator; std::uniform_int_distribution<int> distribution( 0, n/k ); x = distribution( generator ) * k;


You can do like this :

var a = Math.floor(Math.random() * 10) 
var b = a * Math.floor(Math.random() * 10) 
var c = b/a;

document.write(b + " is divisible by " + a + " ( *" + c + ")" )

PC Mag, GENERATING RANDOM NUMBERS While working in Lotus 1-2-3, UP and LOW is evenly divisible by INT, then generates the appropriate random-number formula. By itself, the RAND function 5 _ I. included in all spreadsheet pro~ grams Writing a formula to produce a random number between some other lower and  You can use this random number generator to pick a truly random number between any two numbers. For example, to get a random number between 1 and 10, including 10, enter 1 in the first field and 10 in the second, then press "Get Random Number". Our randomizer will pick a number from 1 through 10 at random. To generate a random number between 1 and 100, do the same, but with 100 in the second field of the picker.


The C++ Standard Library: A Tutorial and Reference, They explain why using rand(), the standard random-value generator of C, causes problems that engines in general have. Many pseudo-random-number generator implementations give remainders that aren't very On the other hand, if the value of n is large, and the generated maximum value is not evenly divisible by  The new random-number generators in SAS provide analysts with fast, high-quality, state-of-the-art random numbers. New random-number generators in SAS. Prior to SAS 9.4M5, SAS supported the Mersenne twister random-number generator (introduced in SAS 9.1) and a hardware-based RNG (supported on Intel CPUs in SAS 9.4M3).


$RANDOM: generate random integer, Another Look at Variables, Next Anyone who attempts to generate random numbers by deterministic means is, of course, RANDOM=$$ # Seeds the random number generator from PID #+ of script. echo " i.e. answer must be evenly divisible by this number. For example: 0.822725 # Uses the awk rand() function. Unfortunately, I need 20,000 random codes, and I keep freezing SSI Web by trying to paste that many items into a list. Is there a way to use the RandNum or SysRand functions to generate numbers divisible by 3? I know I can use them to get 5-digit numbers (by setting Min and Max to 10000 and 99999). Any help is much appreciated!


9.6. random — Generate pseudo-random numbers, This module implements pseudo-random number generators for various the basic function random(), which generates a random float uniformly in the semi-​open This method is supplied with the MersenneTwister generator and some other random.randrange([start], stop[, step])¶: Return a randomly selected element  Here are the steps to generate random numbers using RANDBETWEEN: Select the cell in which you want to get the random numbers. In the active cell, enter =RANDBETWEEN (1,100). Hold the Control key and Press Enter.