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# Each of the two positive integers a and b ends with the digit 2. With

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Math Expert
Joined: 02 Sep 2009
Posts: 59728
Each of the two positive integers a and b ends with the digit 2. With  [#permalink]

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Updated on: 15 Jul 2019, 03:16
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Difficulty:

5% (low)

Question Stats:

100% (00:32) correct 0% (00:00) wrong based on 35 sessions

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Each of the two positive integers a and b ends with the digit 2. With which one of the following numbers does a – b end?

(A) 0
(B) 1
(C) 2
(D) 3
(E) 4

Source: Nova GMAT
Difficulty Level: 500

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Originally posted by Bunuel on 04 Apr 2019, 00:14.
Last edited by SajjadAhmad on 15 Jul 2019, 03:16, edited 1 time in total.
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Joined: 04 Jan 2015
Posts: 3158
Re: Each of the two positive integers a and b ends with the digit 2. With  [#permalink]

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04 Apr 2019, 02:08

Solution

Given:
• a and b two positive integers.
• a and b, both end with the digit 2.

To find:
• Last digit of a - b.

Approach and Working:
• Since a and b, both ends with the same digit, their subtraction will end with 0.

Hence, the correct answer is option A.

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Re: Each of the two positive integers a and b ends with the digit 2. With  [#permalink]

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04 Apr 2019, 03:19
Bunuel wrote:
Each of the two positive integers a and b ends with the digit 2. With which one of the following numbers does a – b end?

(A) 0
(B) 1
(C) 2
(D) 3
(E) 4

given
a=b=2
a-b=0
IMOA
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Re: Each of the two positive integers a and b ends with the digit 2. With  [#permalink]

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07 Apr 2019, 18:46
Bunuel wrote:
Each of the two positive integers a and b ends with the digit 2. With which one of the following numbers does a – b end?

(A) 0
(B) 1
(C) 2
(D) 3
(E) 4

Since the units digit of each number is a 2, the units digit of the difference of those numbers is zero.

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Re: Each of the two positive integers a and b ends with the digit 2. With   [#permalink] 07 Apr 2019, 18:46
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