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04 Sep 2019, 08:32
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A
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Difficulty:
65%
(hard)
Question Stats:
50% (02:20) correct
50%
(01:40)
wrong
based on 8
sessions
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There are 2 two-digit numbers. Their product equals the product of the numbers formed by reversing their digits. Which of the following holds true if the numbers are denoted by ab and cd?
(A) a, b, d and c are in proportion.
(B) a, b, c and d are in proportion.
(C) a, d, c and b are in proportion.
(D) a, c, b, d are in proportion.
(A) a, b, d and c are in proportion.
(B) a, b, c and d are in proportion.
(C) a, d, c and b are in proportion.
(D) a, c, b, d are in proportion.
15 Sep 2019, 12:13
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(10a+b)(10c+d)=(10b+a)(10d+c)
100ac+10ad+10bc+bd= 100bd+10bc+10ad+ac
99ac=99bd
ac=bd
hence a,b,d and c are in proportion.
hence A
_______________________________________________________
"The price of the Victory is High but so are the rewards".
Please provide kudos if you like my post.
100ac+10ad+10bc+bd= 100bd+10bc+10ad+ac
99ac=99bd
ac=bd
hence a,b,d and c are in proportion.
hence A
_______________________________________________________
"The price of the Victory is High but so are the rewards".
Please provide kudos if you like my post.
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