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If p and q represent nonzero single-digit values in the correctly work

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If p and q represent nonzero single-digit values in the correctly work  [#permalink]

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New post 17 Jan 2020, 21:46
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A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

87% (01:12) correct 13% (01:35) wrong based on 30 sessions

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If p and q represent nonzero single-digit values in the correctly worked addition problem above, what is the value of q + p?

A) 2

B) 4

C) 6

D) 8

E) 20

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Re: If p and q represent nonzero single-digit values in the correctly work  [#permalink]

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New post 18 Jan 2020, 08:38
Start with the last row:

6+7+8 = 21

Keep 2

(2) + 2 + 3 + q = 1

as one is not possible it has to be 11

thus q = 4

(1) + p + 5 + 1 = 9

p = 2

p + q = 6

IMO: C
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Re: If p and q represent nonzero single-digit values in the correctly work  [#permalink]

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New post 18 Jan 2020, 09:40
For q:
-> 2(carry fwd)+3+2+q = 1
-> possible value for q is 4 which gives us total as 11.
For p:
-> 1(carry fwd)+p+5+1 = 9
-> possible value for p is 2

p+q = 2+4 =6

IMO Option C
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Re: If p and q represent nonzero single-digit values in the correctly work   [#permalink] 18 Jan 2020, 09:40
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If p and q represent nonzero single-digit values in the correctly work

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