In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[Q]: Problem: what is the smallest positive integer x such that 864 x is the cube of a positive integer
Options: a ) 6 , b ) 12 , c ) 9 , d ) 5 , e ) 2
[A]: e

[Q]: Problem: two circles are there one with arc area 60 digree equal to 45 digree of another circle find the area of circle 1 : circle 2 ratio
Options: ['a ) 3 : 4', 'b ) 1 : 4', 'c ) 1 : 2', 'd ) 2 : 3', 'e ) 1 : 3']
[A]: a

[Q]: Problem: you buy a piece of land with an area of a s 1600 , how long is one side of the land plot ?
Options: a ) 28 , b ) 40 , c ) 30 , d ) 31 , e ) 32
[A]:
b