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01 Nov 2019, 08:00
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B
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Difficulty:
45%
(medium)
Question Stats:
61% (01:39) correct
39%
(01:32)
wrong
based on 390
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Is the two-digit prime number s equal to 19?
(1) The sum of the digits of s is 10.
(2) The positive difference between the tens and units digits of s is 8.
Are You Up For the Challenge: 700 Level Questions
(1) The sum of the digits of s is 10.
(2) The positive difference between the tens and units digits of s is 8.
Are You Up For the Challenge: 700 Level Questions
01 Nov 2019, 08:08
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Is the two-digit prime number s equal to 19?
So the number is
(a) 2-digit
(b) Prime
(1) The sum of the digits of s is 10.
So s can be 19, 37, 73 ...
(2) The positive difference between the tens and units digits of s is 8.
the numbers with difference of 8 can be ONLY 19, 91, 80..
But s is prime, so only possibility is 19..
Suff
B
So the number is
(a) 2-digit
(b) Prime
(1) The sum of the digits of s is 10.
So s can be 19, 37, 73 ...
(2) The positive difference between the tens and units digits of s is 8.
the numbers with difference of 8 can be ONLY 19, 91, 80..
But s is prime, so only possibility is 19..
Suff
B
01 Nov 2019, 08:42
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Bunuel
(1) The sum of the digits of s is 10.
--> Possible values of s = {19, 37, 73} --> Insufficient
(2) The positive difference between the tens and units digits of s is 8.
--> Possible value of s = 19 --> Sufficient
IMO Option B
