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The tens digit of positive integer A is 4. The tens digit of 2A is 9.
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31 Oct 2023, 00:43
31 Oct 2023, 00:43
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The tens digit of positive integer A is 4. The tens digit of 2A is 9.
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
Unit digit of A |
4 |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
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Free Materials for the GRE General Exam - Where to get it!!
GRE Geometry Formulas
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Free Materials for the GRE General Exam - Where to get it!!
GRE Geometry Formulas
GRE - Math Book
Re: The tens digit of positive integer A is 4. The tens digit of 2A is 9.
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08 Nov 2023, 13:05
08 Nov 2023, 13:05
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A is some digit with tens digit 4, and 2A has tens digit of 9.
The minimum value of A is 45 -> 45*2=90 which fits our conditions. In this case, the units digit of A is greater than 4.
What about the maximum? Well 50*2 is 100, so clearly the maximum of A is 49, in which 2A is 98.
So 45<=A<=49
In all cases, the units digit is greater than 4.
A.
The minimum value of A is 45 -> 45*2=90 which fits our conditions. In this case, the units digit of A is greater than 4.
What about the maximum? Well 50*2 is 100, so clearly the maximum of A is 49, in which 2A is 98.
So 45<=A<=49
In all cases, the units digit is greater than 4.
A.
gmatclubot
Re: The tens digit of positive integer A is 4. The tens digit of 2A is 9. [#permalink]
08 Nov 2023, 13:05
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