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12 Apr 2019, 23:37
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Difficulty:
45%
(medium)
Question Stats:
66% (01:46) correct
34%
(01:47)
wrong
based on 111
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If N is a 3-digit integer, what is the value of N?
(1) The ten’s digit of N is twice the unit’s digit and half of the hundred’s digit.
(2) The ten’s digit of N is thrice the unit’s digit and one-third of the hundred’s digit.
(1) The ten’s digit of N is twice the unit’s digit and half of the hundred’s digit.
(2) The ten’s digit of N is thrice the unit’s digit and one-third of the hundred’s digit.
12 Apr 2019, 23:48
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1. has 2 possibilities (421 and 842) so it is insufficient on it's own.
2. Has only 1 possibility (931) so we know that N is definitely 931, making this statement sufficient on it's own.
B it is.
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2. Has only 1 possibility (931) so we know that N is definitely 931, making this statement sufficient on it's own.
B it is.
Posted from my mobile device
13 Apr 2019, 00:59
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Amrita2405
Let the 3 digit integer, N, be HTO.
1. H = 4x, T = 2x, O = x
Case 1: x = 1, the three digit integer is 421.
Case 2: x = 2, the three digit integer is 842.
Since we have two different integers, we don't have an unique value of N. (Insufficient)
2. H = 9x, T = 3x, O = x
When x = 1, the three digit integer is 931.
This is the only option as N is not a 3-digit number when x = 2. (Sufficient - Option B)
