How do I select sprites with the same variable

I have sprites with the same variable - number.

If I click on one sprite i want the other sprites with the same variable "number" to be selected.

Ther's a "Compare instance variable" picking event for sprites.

What instance I should compare with? I dont know the exact value of "number", they differ.

I need something like:

On sprite left click --------------------------------> set sprites value to select 1.

Select all sprites with the same

"number" value as for "clicked"

Something like this?

https://copy.com/khmGMFr3tkug2i8o