Please solve :
0
1. If 10th unit of 1/n is zero.
2. If unit digit of 1/n >= n
Please explain.
Please solve :
0
1. If 10th unit of 1/n is zero.
2. If unit digit of 1/n >= n
Please explain.
Is the answer B?
Given - N is between 0 and 9, both inclusive
Now condition 2 says that 1/n > = n
so n = 1 (1/1 = 1, which satisfies condition 2)
Is this correct?
Please solve :
0
1. If 10th unit of 1/n is zero.
2. If unit digit of 1/n >= n
Please explain.
IMO E !
0
1. If 10th unit of 1/n is zero.
1/n can be 1/9, 1, 2, 3, 4, 5, 6
n can be 1,1/2,1/3,9, insufficient
2. If unit digit of 1/n >= n
Implies n^2 n can be 1,1/2,1/3, , insufficient
From 1 and 2, n can be 1,1/2,1/3. no unique value, hence insufficient!
Thanks for replying...the official answer is E
Please solve :
0
1. If 10th unit of 1/n is zero.
2. If unit digit of 1/n >= n
Please explain.
1. 1/n is zero is possible if the numerator is 0
2. If unit digit of 1/n >= n
1/n can be 1 only if n = 1 , coz 1/1 = 1
Hence IMO B...
Hi studio512,
Thanks for the link! The questions look pretty good :)
Ashesh
Hi
I am new to this forum. Please provide me with some good advice from where to practise some of the tough PS and DS problems.
Thanks
Hi,
I came across this question but could not figure out the answer.
Is n^p an odd integer?
(I) n is an odd integer.
(II) p is an even integer
The OA is E. But acc to me it should be A.
Please explain.
I) is p an integer? not known so cant be said if n^p is integer - not suff
II) is n an integer? not known so cant be said if n^p is integer - not suff
n is an odd integer and p is even integer then n^p is odd if p >= 0 and n^p is not integer if p
So C and D ruled out.
Hence E
The answer is B and it is explained below
Given , question is true? Or is true? So basically we are asked whether we can substitute 3 notebooks with 3 pencils. Now if we can easily substitute notebooks with pencils (equal number of notebooks with pencils ) and the sum will be lees than 20. But if we won't know this for sure.
But imagine the situation when we are told that we can substitute 2 notebooks with 2 pencils. In both cases ( or ) it would mean that we can substitute 1 (less than 2) notebook with 1 pencil, but we won't be sure for 3 (more than 2).
(1) . We can substitute 2 notebooks with 2 pencils, but this not enough. Not sufficient.
(2) . We can substitute 5 notebooks with 5 pencils, so in any case ( or ) we can substitute 3 notebooks with 3 pencils. Sufficient.
Answer: B..
I dint get the Explanation
Let n be the price of notebook and p be the price of pencil
Given information : 9n + 3p
Asked is 12n + 12p
Referring to what is in brackets above, can we trade substitute 6 books for 6 pencils and yet buy within 40 francs?
1.
7n + 5p and 9n + 3p
so we can substitute 2 notebooks with 2 pencils and buy within 20 francs.
Why is it insufficient ?
2.
4n + 8p and 9n + 3p
In this we substitute 5 notebooks with 5 pencils and buy within 20 francs
Why is it sufficient?
Hi,
A simple one frm my side:
By what percent has the price of an overcoat been reduced?
(1) The original price was $380.
(2) The original price was $50 more than the reduced price.
Hi,
A simple one frm my side:
By what percent has the price of an overcoat been reduced?
(1) The original price was $380.
(2) The original price was $50 more than the reduced price.
stmt 1 :
orginal price is x = 380 .. we dont get any final answer for the question just by stmt 1
stmt 2 :
say if orginal price is x , reduced price is x - 50
so we can calculate percent by 50/x * 100 . x can take any value . so arriving at unique final answer is not possible
combining both statement ,
we have 50 /380*100 as percentage
so both statements are needed to answer the question
Hi,
A simple one frm my side:
By what percent has the price of an overcoat been reduced?
(1) The original price was $380.
(2) The original price was $50 more than the reduced price.
new=original+change
two are needed to know the third.
1) new=380+change - not sufficient
2) new=380+(-50) - not sufficient
3) new = 380-50 - sufficient
percent change = ((new-original)/original) * 100
= ((-50)/380)*100`
Hi,
I am unable to come to an answer for this:
If w, x, y are consecutive integers with w (a) X^2 12 = 4x
(b) The sum of w, x, and y is equal to the product of w, x, and y.
Hi,
I am unable to come to an answer for this:
If w, x, y are consecutive integers with w (a) X^2 - 12 = 4x
(b) The sum of w, x, and y is equal to the product of w, x, and y.
w
x=w+1
y=w+2
w+x+y = w+w+1+w+2 = 3w+3
So the question is "what is w?"
a) x^2 - 12 = 4x
-> x^2 -4x - 12 = 0
-> (x-6)(x+2) = 0
-> x = 6 or x=-2
-> w =5 or w=-3
but w
b) w(w+1)(w+2) = 3w+3
w(w^2 + 3w + 2) = 3w+3
w^3 + 3w^2 + 2w = 3w+3
w^3+3w^2-w = 3
w(w^2 + 3w - 1) = 3
but w
Not sufficient
Answer A
Please confirm with official answer and click "thanks" 😁
thanks for sharing this with us,/
Hello,
My question is more basic math and not DS but I thought Ill find help here.
I was going through Manhattan Number properties - chapter 6 (roots strategy)
"The book says that a square root has only one value."
Even roots have positive solutions only and odd roots of negative numbers have a negative solutions and positive numbers have positive solutions.
I agree with the solutions of negative numbers but not for that of positive numbers. Kind of goes against all the math i learnt. The book says that this is standard math convention. Can some one comments on this. Would really help.
Thanks a lot in advance.
Best Regards,
Murthy:)
Hello,
My question is more basic math and not DS but I thought Ill find help here.
I was going through Manhattan Number properties - chapter 6 (roots strategy)
"The book says that a square root has only one value."
Even roots have positive solutions only and odd roots of negative numbers have a negative solutions and positive numbers have positive solutions.
I agree with the solutions of negative numbers but not for that of positive numbers. Kind of goes against all the math i learnt. The book says that this is standard math convention. Can some one comments on this. Would really help.
Thanks a lot in advance.
Best Regards,
Murthy:)
When you get sqrt(16) it is 4 and not -4, to express -sqrt(16) will be -4.
That's GMAT convention
Hi
I am new to this forum. Please provide me with some good advice from where to practise some of the tough PS and DS problems.
Thanks
Was wondering if you have been able to source out for more study material on PS and DS problems. i have enrolled myself at IMS but then had already begun my preparations some time back. Need to work on this area.
1. 1/n is zero is possible if the numerator is 0
2. If unit digit of 1/n >= n
1/n can be 1 only if n = 1 , coz 1/1 = 1
Hence IMO B...
I think it is E , since it is not mentioned that n is an integer ,and if we take real numbers we can get multiple answers
What is the solution for this. Please explain with reasons/steps:
3.If x is positive, is x>3?
(1) (x-1)whole square > 4
(2) (x-2)whole square > 9
a. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
b. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
c. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
d. EACH statement ALONE is sufficient.
e. statemet (1) and (2) TOGETHER are NOT sufficient.