Question

The Witches coven are making a potion and Ethel, Glinda, Locasta and Circe each add a different ingredient. When the potion is finished, there is 1/4 of the bat blood left, 1/3 of the knotgrass, 1/2 of the moonstone and 5/8 of the unicorn hair. Ethel used the most. Glinda used the least. Locasta used more than Circe. Who used the moonstone?

Answer 1

The correct answer is - Circe.

Solution: The lead to the common denominator is 24.

Then, 

1/4 = 6/24; years. Bat blood used - 18 parts (since 24 - 6 = 18)

1/3 = 8/24; knotgrass used - 16 parts

1/2 = 12/24; moonstone used - 12 parts

5/8 = 15/24; hair is unified used - 9 parts

Hence, by the condition of the problem: 

Bat - Ethel 

Knotgrass - Lokasta 

Moon stone - Circe 

Unicorn hair - Glinda. 

So, The Moonstone was used by Circe.