Charlotte estimates the weight of Alex's head and feet
Here's a brief description of the contestant's attempt. Someone's probably working writing up more detail!
Charlotte initially worked out Alex's height was the same length as 7 of his heads so divided his overall weight by 7 before deciding weight was not evenly distributed between "head, shoulders, knees and toes", eventually just estimating her answer. She guessed Alex's head weighed 5Kg and his feet weighed 3Kg, receiving 4 points.
(Written by Taskmaster Wiki contributors)