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12 Nov 2021, 04:15
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
62% (01:26) correct
38%
(01:17)
wrong
based on 206
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What is the maximum number of 3x3 squares that can be formed from the squares in a 6x6 checker board?
A. 4
B. 6
C. 12
D. 16
E. 24
Attachment:
1.jpg [ 27.11 KiB | Viewed 6750 times ]
12 Nov 2021, 22:55
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Bunuel
See the attached figure.
Attachment:
1.jpg [ 36.1 KiB | Viewed 6233 times ]
In the attached figure, we fix the top left vertex. It can be any of the four points in horizontal, 1, 2, 3 and 4, that is all except last four as we will not be left with 3 squares on right of it otherwise.
Similarly, vertically we have A, B C and D.
SO the vertex could be any of 4*4 or 16 points: A1, A2, A3, A4, B1, B2.......D3 and D4.
D
12 Nov 2021, 23:28
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Considering a block of 3 x 3 in the bottom left corner, we have the option to move 4 units right in X axis and 4 units up in Y axis. Hence 4 x 4 = 16 squares can be formed.
Option D
Option D
