Multiplication of binary

Number Theory Level 2

What is 1100 1 2 × 1001 1 2 11001_2 \times 10011_2 in decimal?

a 2 a_2 means binary number a a .


The answer is 475.

. . by . . , 14, South Korea

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1 solution

. .
Feb 21, 2021

11001 11001 in decimal form is 25, 10011 10011 in decimal form is 19. So 1100 1 2 × 1001 1 2 11001_2 \times 10011_2 equals to 25 × 19 25 \times 19 which is equal to 475 \boxed { 475 } !!!!

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