Think of it this way:
_ _ _ (3 digit number)
for the first blank you could have 7 possibilities
for the second blank you could have 6 possibilities
for the third blank you could have 5 possibilities
because each time you fill in a blank one number is removed from the list of possibilities
7×6×5=210. there are 210 possibilities
1.)
460. 100%
74. X
X= 100•74/460
X=16.09%
2.)
175 100%
172. X
X=172•100/175
X=98.28%
The answer is c! As CBA & ZXY is not only a full triangle, but its written incorrectly.
ABC → CBA
XYZ → ZYX (not ZXY)
Answer: 200cm
Step-by-step explanation:
The center Planck is a square of length 8cm.
The 4 next planks are of 16 cm each
And the next 4 Planks are of 32 cm each.
8 + 4(8×2) + 4(8×4)
8 + 4(16) + 4(32)
8 + 64 + 128
200 cm
Length of the original plank is 200cm
