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siddharthkapoor
GMAT Club Reviews PM Intern
Joined: 10 Apr 2018
Last visit: 12 Sep 2025
Posts: 527
Given Kudos: 522
Location: India
Schools: ISB'22 (D)
GMAT 1: 680 Q48 V34
GPA: 3.3
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06 Oct 2020, 19:57
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D
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Difficulty:
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Question Stats:
50% (01:59) correct
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based on 171
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If 2-digit positive integer n is 4 times the sum of the units digit of n and the tens digit of n, what is the value of n?
(1) The tens digit of n is 1.
(2)The units digit of n is a prime number.
(1) The tens digit of n is 1.
(2)The units digit of n is a prime number.
06 Oct 2020, 21:20
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If 2-digit positive integer n is 4 times the sum of the units digit of n and the tens digit of n, what is the value of n?
Let the Tens Digit =a and Unit digit =b
10a+b= 4(a+b)
2a=b
Find the value of a and b?
(1) The tens digit of n is 1.
a=1; b=2;n=12
This statement is sufficient
(2)The units digit of n is a prime number.
b=2,3,5,7,....
We know that n is Positive integer and we also know that b=2a; a=b/2; a need to be integer therefore b has to be 2
a=1;b=2;n=12
This statement is sufficient
Answer is D
Let the Tens Digit =a and Unit digit =b
10a+b= 4(a+b)
2a=b
Find the value of a and b?
(1) The tens digit of n is 1.
a=1; b=2;n=12
This statement is sufficient
(2)The units digit of n is a prime number.
b=2,3,5,7,....
We know that n is Positive integer and we also know that b=2a; a=b/2; a need to be integer therefore b has to be 2
a=1;b=2;n=12
This statement is sufficient
Answer is D
27 Mar 2025, 05:04
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It says that n is integer but that doesnt mean a and b have to be integer right?
if b=3 then a=1.5 in which case 10a+b =15+3 =18 which is an integer and
18=4(1.5+3) too
so b can be 2 or 3 and answer is (A) right?
if b=3 then a=1.5 in which case 10a+b =15+3 =18 which is an integer and
18=4(1.5+3) too
so b can be 2 or 3 and answer is (A) right?
prateekchugh
