Question
Question: Among 6 trees, A, B, C, D, E and F each having
a different height, which tree is the third tallest? Statement: (I) B is shorter than only D. C is taller than E but shorter than A and F. (II) C is shorter than four other trees. B is taller than A and E but shorter than D. F is not the tallest.ÂSolution
Combining I and II: From I: D > B > ?; C < A/F but > E Let’s try to order: Tallest (1st): D 2nd tallest: B (from I & II) Who is 3rd tallest? Options: A or F. From I: C < A/F → so C < 3rd tallest → 3rd tallest must be A or F . After checking carefully, combining both statements allows us to determine the 3rd tallest uniquely . Answer: Both statements together are sufficient.
From II: D tallest, C fifth, B > A/E, F not tallest
From II: F is not tallest, B > A/E → B second → A < B → A could be 3rd?
Yes, possible: Third tallest = F ?
7, 26, 238, 962, 8522, 34078
12                          13                         30                     �...
14Â Â Â 42Â Â Â Â 105Â Â Â Â 210Â Â Â Â Â 315Â Â Â ?
8      24       48      144      ?     864
...Find sum of first n terms: 2 + 6 + 12 + 20 + 30 + …
6Â Â Â Â Â Â Â Â Â Â Â Â Â Â 3Â Â Â Â Â Â Â Â Â Â Â Â Â Â 24Â Â Â Â Â Â Â Â Â Â Â 218Â Â Â Â Â Â Â Â Â 3486Â Â Â Â Â Â Â 43575
10      �...
Which of the following is true about the relation between the wrong numbers in the following series?
I: 10, 18, 29, 40, 54, 70
II: 15, 24,...
Study the given pattern carefully and select the number that can replace the question mark (?) in it.
4 7 6
15 ? 21
44 68 60
100Â Â Â Â 221Â Â Â Â 77Â Â Â Â 245Â Â Â Â 50Â Â Â 275
22   39    58    81   ?      141