If m, n and p are nonzero digits and mn = p. What is p?

Question

(1) n < m
(2) m = 5

Are You Up For the Challenge: 700 Level Questions

chetan2u · Accepted Answer

m, n and p are nonzero digits => so they can be anything from 1 to 9
mn = p

1) n<m
So m is surely greater than 1.
mn =p......5*1=5......3*2=6
Insufficient

2) m=5
mn =p, so 5n=p.
But p is a digit, so maximum value of p can be 9.
The moment we take n=2, p=5*2=10, which is a 2-digit integer and not valid here as p is a digit. 
Note : There are only 10 digits - 0 to 9. When we say p is a digit, it means p is a single digit. 
Thus n=1, and mn=5*1=5=p. 
Sufficient

B

suchita2409 · Answer

If m, n and p are nonzero digits and mn = p. What is p?
(1) n < m 
Statement 1)It could me anything.
p= mn
We just have restraint that m<n .M can have many values 9,8,7,6,5,4,3,2.
N can have 8,7,6,5,4,3,2,1
So many combinations.
Insufficient.
 (2) m = 5
We just have m=5 ;
No restraint on n. it could be 1,2,3,4,5,6,7,8,9
So many combinations.
Insufficient.
1+2 
We do have restraint and value of m,
But still have 51,52,53,54 combinations
Insufficient.
E IMO.

anjanita · Answer

I think the answer is E

If m, n and p are nonzero digits and mn = p. What is p?
(1) n < m

This statement is insufficient as m can take any value i.e. 9,8,7,6,5,4,3,2.
Therefore, N can have 8,7,6,5,4,3,2,1
.
(2) m = 5
We just have m=5 ;
No restraint on n. it could be 1,2,3,4,5,6,7,8,9
So, statement 2 is also Insufficient.

Combining Statement 1 & 2
m can take only value as 5, but n can be 1,2,3 or 4
So, p can have more than one option
So, combining the statements also insufficient

carouselambra · Answer

I am not completely sure but I think it should be (B)

If m, n and p are nonzero  digits  and mn = p. What is p?

It has been mentioned that m,n,p are non zero digits and NOT numbers. Hence, assuming they are single digits.

(1) n < m
Example : 1*2/ 2*3
(A) is not sufficient

(2) m = 5
When we know that m=5, the only possibility that remains is that of n=1 since that is the only combination that will result in p as a non zero DIGIT.
(B) is sufficient.

Like I said, I have solved as per my understanding of the question. Will wait for the OE.

GCMEMBER · Answer

If m, n and p are nonzero digits and mn = p. What is p?

(1) n < m
No information about p
Not sufficient

(2) m = 5
No information about n
Not sufficient

(1) + (2)

For m=5, n=4, p will be 20
For m=5, n=3, p will be 15

Not sufficient.

Choice E

Posted from my mobile device

Jyotiraditya89 · Answer

Could someone please answer how in the question we are assuming all are single digit numbers ?
Thanks

Bunuel · Answer

Check the highlighted part:

If m, n and p are  nonzero digits  and mn = p. What is p?

Nonzero digits are 1, 2, 3, 4, 5, 6, 7, 8, and 9.

If m, n and p are nonzero digits and mn = p. What is p?

Prep Toolkit

Top 5 GMAT Debrief Videos

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards

GMAT Data Sufficiency (DS) Questions

If m, n and p are nonzero digits and mn = p. What is p?

Prep Toolkit

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards