Aida has twice as many dolls as Sophie, and Sophie has twice as many dolls as Vera. How many dolls do Aida, Sophie, and Vera have combined if Vera has 20 dolls?
If Sophie has twice as many dolls as Vera, then she has 2 * 20 dolls = <<2*20=40>>40 dolls
Aida has 2 * 40 dolls = <<2*40=80>>80 dolls, twice the number Sophie has.
In total, they have 80 dolls + 40 dolls + 20 dolls = <<80+40+20=140>>140 dolls
#### 140