Answer:
Number of beads = 14 beads
Explanation:
It is given that fourth bead is directly across eleventh bead and all beads are uniformly spaced.
Let us assume that the number of beads are 4. In that case first and third will be across and second and fourth will be across.
So their difference = (3-1) or (4-2) = 2
Number of beads = Difference * 2 = 2*2 = 4
In this case fourth bead is directly across eleventh bead, so difference = (11-4)=7
Number of beads = 2 * Difference = 2 * 7 = 14 beads
