Question

Multiply 13 and 25 by Russian Multiplication method in base 3 (which means instead of doubling the numbers, you should triple them and find the answer)

Answer 1

ANSWER ⤵️

Multiplying 13 and 25 by the Russian multiplication method, the answer is 351.

Russian method of multiplying is different from the usual multiplication method.

The given problem is 13 * 25:

Step 1:

Divide the right column by 2, until the remainder is 1.  

Step 2:

Double the right column digits.

Solution for step 1&2:

25(Left)                                   13(Right)

25/ 2 = 12                               13 * 2 = 26  

12/2  =  6                                26 * 2 = 52

6/2 = 3                                   52 * 2 = 104

3/2 = 1

In the Russian method, the right column should be doubled. In the given question, they have asked to triple.  

Therefore,  tripling the right column will give,

25(Left)                                     13(Right)

25/ 2 = 12                              13 * 3 = 39

12/2  =  6                               39 * 3 =  117

6/2 = 3                                  117 * 3 = 351

3/2 = 1

Step 3:

The even number on the left has to be a strikeout.

25(Left)                                      13(Right)

25/ 2 = 12(×)                            13 * 3 = 39

12/2  =  6(×)                              39 * 3 =  117

6/2 = 3                                      117 * 3 = 351

3/2 = 1    

(×) = striked out lines.         

Step 4:

Add the right column numbers.

There is only one number left = 351

Therefore the answer is 351.

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