counting figures model question set 1 Practice Questions Answers Test with Solutions & More Shortcuts
counting figures PRACTICE TEST [3 - EXERCISES]
counting figures model question set 1
counting figures model question set 2
counting figures model question set 3
Question : 11
a) a
b) b
c) c
d) d
Answer »Answer: (a)
The figure in question has been labelled as shown in the following figure
Smallest Triangles = ΔEAP, ΔEDP, ΔAGB, ΔHFG, ΔGBF, ΔPHD = 6
Triangles formed with two triangles = ΔEAD, ΔAGD, ΔBHF, ΔEHD, ΔAPF, ΔABF= 6
Largest Triangles = ΔBDC, ΔAEF, ΔABD = 3
∴ Total Triangles = 6 + 6 + 3 = 15
Question : 12
a) a
b) b
c) c
d) d
Answer »Answer: (a)
Total 28 triangles are as follow
ΔABG, | ΔAFG, | ΔCHD, | ΔHDE, | ΔBGI, |
ΔBCI, | ΔHCI, | ΔHGI, | ΔGHJ, | ΔHEJ, |
ΔEFJ, | ΔGFJ, | ΔABF, | ΔCDE, | ΔBCG, |
ΔBCH, | ΔHCG, | ΔBHG, | ΔGHE, | ΔHEF, |
ΔGFE, | ΔGHF, | ΔABH, | ΔAFH, | ΔCDG, |
ΔGDE, | ΔBHF and | ΔCGE |
Question : 13
a) a
b) b
c) c
d) d
Answer »Answer: (c)
There are total 27 triangles in the given figure.
From this figure it is clear that,
Triangles formed by single units = ΔABC, ΔBDE, ΔBCE, ΔCEF, ΔDGH, ΔDHE, ΔHEI, ΔEIF, ΔFIJ, ΔGKL, ΔGLH, ΔLHM, ΔHMI, ΔMIN, ΔINJ, Δ NJO i.e., 16 triangles.
Triangles formed by Combining 4 triangles are ΔADF, ΔBGI, ΔCHJ, ΔDKM, ΔLEN, ΔMFO and ΔDFM i.e., 7 triangles.
Triangles formed by Combining 9 triangles are ΔAGJ, ΔBKN and ΔCLO i.e., 3 triangles.
One Triangle ΔAKO formed by complete figure
∴ Total number of Triangles = 16 + 7 + 3 + 1
Question : 14
a) a
b) b
c) c
d) d
Answer »Answer: (c)
Smallest hexagons = MBCQPN, OCDSRP, TNPVIJ, UPRWHI = 4
Medium hexagons = KLBCPJ, JNCDRI, IPDEFH, GFDCPH, HRCBNI, IPBALJ, LBCRIJ, NCDFHI, MBDSRN, TNRWHJ = 10
Largest hexagons = LBDFHJ = 1
∴Total hexagons = 4 + 10 + 1 = 15
Question : 15
a) a
b) b
c) c
d) d
Answer »Answer: (c)
The figure in the question may be labelled as shown in the following figure.
There are nine triangles in the upper half of the figure = ΔAEI, ΔAIG, ΔAEG, ΔGEO, ΔGBJ, ΔBFJ, ΔGBF, ΔGOF and ΔGEF.
Similarly, there are nine triangles in the lower half figure i.e., EFCD.
There are two more triangles ΔEGH and ΔFGH.
Hence, there are atotal of 20 triangles.
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