Question

What is the GCF of 40 and 64?

Answer 1

Step-by-step explanation:

8

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Answer 2

Answer:

HCF of  $40$ and $64$ is $8$ .

Step-by-step explanation:

To find : HCF of 40 and 64  .

Solution :  

• HCF is the highest common factor also called as greatest common divisor ,( GCD ).
• To find HCF of $40$ and $64$ we find prime factors of these numbers . Then , take highest common prime factor out of them .  
• Prime factors of $40 = 2\times 2\times2\times 5$  

                                        $=2^{3} \times 5$

• Prime factors of $64 = 2\times 2\times 2\times 2\times 2\times 2$  

                                       $= 2^{6}$

• HCF of  $40$ and $64$ = $2\times 2\times 2$

                                     $= 8$