# encoding: utf-8                                                            

$eps = 1e-8
def sign(d) 
  d > $eps ? 1 : (d < -$eps ? -1 : 0)
end

def solve(xa, ya, ra, xb, yb, rb)
  d = Math.sqrt((xb - xa) ** 2 + (yb - ya) ** 2)

  if sign(d - (ra - rb).abs) == -1
    2 * ((ra - rb).abs / (ra - rb)).to_i
  elsif sign(d - (ra - rb).abs) >= 0 and sign(d - (ra - rb).abs) <= 0
    1
  else
    0
  end
end

def main
  t = gets.chomp.to_i
  (1..t).each do |ca|
    xa, ya, ra, xb, yb, rb =gets.chomp.split(/\s/).map(&:to_f)
    puts "#{solve(xa, ya, ra, xb, yb, rb)}"
  end
end

main