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24 Sep 2025, 00:48
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
81% (00:52) correct
19%
(01:17)
wrong
based on 68
sessions
History
Date
Time
Result
Not Attempted Yet
How many more boys than girls are in the class?
(1) There are a total of 10 boys and girls in the class.
(2) The number of boys in the class equals the cube of the number of girls in the class.
(1) There are a total of 10 boys and girls in the class.
(2) The number of boys in the class equals the cube of the number of girls in the class.
Let us take boys as b and girls as g.
We need to find out b - g = ? (Always articulate the question in your mind or write it in short on the page with DS questions. Worked like a charm for me.)
Not enough information.
NOW FORGET (1)
Not enough information because b could be 1000 and g could be 10 or b could be 1331 and g could be 11.
Both together. b + g = 10 and b = g^3. The only possible combination is b = 8 when g = 2. This way, b + g will be equal to 10.
Correct answer is C.
We need to find out b - g = ? (Always articulate the question in your mind or write it in short on the page with DS questions. Worked like a charm for me.)
Quote:
Not enough information.
NOW FORGET (1)
Quote:
Not enough information because b could be 1000 and g could be 10 or b could be 1331 and g could be 11.
Both together. b + g = 10 and b = g^3. The only possible combination is b = 8 when g = 2. This way, b + g will be equal to 10.
Correct answer is C.
24 Sep 2025, 09:06
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B-G=?
(1) There are a total of 10 boys and girls in the class.
B+G=10 (two variables)
Insufficient
(2) The number of boys in the class equals the cube of the number of girls in the class.
B=(G)^3
1=1 or 8=(2)^3 or 27=(3)^3
B & G can take many values
Insufficient
(1)&(2)
Only possible combination when B=8 and G=2.
Sufficient
C
(1) There are a total of 10 boys and girls in the class.
B+G=10 (two variables)
Insufficient
(2) The number of boys in the class equals the cube of the number of girls in the class.
B=(G)^3
1=1 or 8=(2)^3 or 27=(3)^3
B & G can take many values
Insufficient
(1)&(2)
Only possible combination when B=8 and G=2.
Sufficient
C
