collinear points lies in a single line
that means sum of distance between 2 points is equal to distance between end points.
for example if A B and C lies in a line then
AB + BC = AC
here (1,1) , (2,2) and (3, 3) follows the same rule. ao ans is option D
This situation is represented in annex.
From Pythagorean theorem you've got equation:

There isn't any solutions where x>0, so this situation is IMPOSSIBLE.
Did you write correctly this question....?
Answer:
100
Step-by-step explanation:
Here is your answer
Let the number of wizards is x
20% more gobins than wizards.
ATQ
Hence Numbers of wizards are 100 in a magic club.
Answer:
x = 12
Step-by-step explanation:
For the middle size triangle
short leg = x
long leg = (25 - 9) = 16
ratio = x/16
For the small triangle
short leg = 9
long leg = x
ratio = 9/x
Similar triangles are proportional so
Set the ratios equal
x/16 = 9/x
Cross multiply
x² = 144
Take the square root of both sides
x = 12