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Which of the following expressions are equal to 21 ?
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Updated on: 21 Jan 2019, 10:43
Updated on: 21 Jan 2019, 10:43
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Question Stats:
58% (00:53) correct
41% (00:56) wrong based on 41 sessions
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Which of the following expressions are equal to 21 ?
Indicate all correct answer choices.
A) \(3 + 7 * 2 + \frac{12}{(2 + 1)}\)
B) \(1 + (\frac{3}{2}) * 10 + 1\)
C) \(7 – 3 * 3 + (5 + 4)\)
D) \(4 * (3 + 2) – (3 – 4)\)
E) \((2 + 6) * 1 + 3 – 6 * 4 + 1\)
Indicate all correct answer choices.
A) \(3 + 7 * 2 + \frac{12}{(2 + 1)}\)
B) \(1 + (\frac{3}{2}) * 10 + 1\)
C) \(7 – 3 * 3 + (5 + 4)\)
D) \(4 * (3 + 2) – (3 – 4)\)
E) \((2 + 6) * 1 + 3 – 6 * 4 + 1\)
Originally posted by CAMANISHPARMAR on 21 Jan 2019, 02:59.
Last edited by Carcass on 21 Jan 2019, 10:43, edited 1 time in total.
Last edited by Carcass on 21 Jan 2019, 10:43, edited 1 time in total.
Edited by Carcass
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
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Re: Which of the following expressions are equal to 21 ?
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19 Jan 2020, 07:21
19 Jan 2020, 07:21
1
CAMANISHPARMAR wrote:
Which of the following expressions are equal to 21 ?
Indicate all correct answer choices.
A) \(3 + 7 * 2 + \frac{12}{(2 + 1)}\)
B) \(1 + (\frac{3}{2}) * 10 + 1\)
C) \(7 – 3 * 3 + (5 + 4)\)
D) \(4 * (3 + 2) – (3 – 4)\)
E) \((2 + 6) * 1 + 3 – 6 * 4 + 1\)
Indicate all correct answer choices.
A) \(3 + 7 * 2 + \frac{12}{(2 + 1)}\)
B) \(1 + (\frac{3}{2}) * 10 + 1\)
C) \(7 – 3 * 3 + (5 + 4)\)
D) \(4 * (3 + 2) – (3 – 4)\)
E) \((2 + 6) * 1 + 3 – 6 * 4 + 1\)
A) \(3 + 7 * 2 + \frac{12}{(2 + 1)}=3 + 7 * 2 + \frac{12}{3}=3 + 14 + \frac{12}{3}=3 + 14 + 4=21\)
B) \(1 + (\frac{3}{2}) * 10 + 1=1 + (1.5) * 10 + 1=1 + 15 + 1=17\)
C) \(7 – 3 * 3 + (5 + 4)=7 – 3 * 3 + 9=7 – 9 + 9= (-2) + 9=7\)
D) \(4 * (3 + 2) – (3 – 4)=4 * 5 – (–1)=20 – (–1)=21\)
E) \((2 + 6) * 1 + 3 – 6 * 4 + 1=8 * 1 + 3 – 6 * 4 + 1=8 + 3 – 6 * 4 + 1=8 + 3 – 24 + 1=11 – 24 + 1= -13 + 1 = -12\)
Answer: A, D
Cheers,
Brent
gmatclubot
Re: Which of the following expressions are equal to 21 ? [#permalink]
19 Jan 2020, 07:21
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