Question

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3. What is the next number in the sequence 20, 10, 5, 5/2

Answer 1

`\large\boxed{(5)/(4)}`

Explanation:

`a_1=20\\\\a_2=(20)/(2)=10\\\\a_3=(10)/(2)=5\\\\a_4=(5)/(2)\\\\a_5=((5)/(2))/(2)=(5)/(2)\cdot(1)/(2)=(5)/(4)`