Which of the following is the Highest Common Factor of 20, 40 and 60?	Choose the correct choice from the following:
A) 8	B) 10	C) 6	D) 20	E) 12
HCF IS
2*2*5= 
<gadget id="calculator">2*2*5</gadget>
<output>20</output>
20
Ans is :20
<result>D</result>
Which of the following is the Highest Common Factor of 20, 40 and 60?