Solve the given word problem: Selecting 2 numbers from a watch face

[chwala]

Homework Statement

see attached

Relevant Equations

grade 9 maths

I honestly do not understand this question, my thoughts;

ignoring the diagram and using algebra i can see that the step size [1,5] → [2,6] can be found by adding 1 (common difference) to each number meaning that the answer is A...

...the other options B,C,D and E can not be related by a common difference

 

[.Scott]

Right now, 1 and 5 are shown.
After the disk is rotated, either
10 and X will show or
10 and Y will show.
But in both cases, the gap between 10 and the other (X or Y) will be the same as the gap between 1 and 5.

 

[chwala]

Right now, 1 and 5 are shown.
After the disk is rotated, either
10 and X will show or
10 and Y will show.
But in both cases, the gap between 10 and the other (X or Y) will be the same as the gap between 1 and 5.

Aaaaaah haha... I can now see it ... the other number is either $10+4= 2$ or $20-4=6$. The word problem was a bit confusing to me.

 

[Gavran]

or 20−4=6.

or 10-4=6.

 

[chwala]

or 10-4=6.

yeah typo error. Cheers man.