DS question

If p and n are positive integers and p>n, what is the remainder when p^2 - n^2 is divided by 15?
1) when p+n is divided by 5, the remainder is 1
2) when p-n is divided by 3 the remainder is 1

OA is E

Thanks!

Ratios Question

A contractor combined x tons of a gravel mixture that contained 10% gravel by weight with y tons of a mixture that contained 2% gravel by weight to produce z tons of a mixture that was 5% gravel by weight.
What is the value of x?
1) y = 10
2) z = 16

OA is D

thanks

SC doubt

As the former chair of the planning board for 18 consecutive years and a board member for 28 years, Joan Philkill attended more than 400 meetings and reviewed more than 700 rezoning applications.
A) As the former
B) The former
C) Former
D) She was
E) As the

OA is E[/b][/i]

Thanks very much, I got it now

Thanks everyone
I have understood my mistake. I was including in white mice where it was not needed
That is calculating prob (2nd mouse being black) = P(1st mouse is non black) * P(2nd mouse is black)

A bit confused

Hi Pl see the question below: 8. Out of a box that contains 4 black and 6 white mice, three are randomly chosen. What is the probability that all three will be black? a) 8/125. b) 1/30. c) 2/5. d) 1/720. e) 3/10. I tried solving it by 2 methods: In method 1, I chose by 4C3/ 10C3 and got the correct ...

Hi I am sorry for the late reply but the OA is C The explanation is as below: CORRECT. The “if� clause properly uses the subjunctive mood, “if adolescence were.� The singular “it� refers to the singular “adolescence.�Was� should not be used in an “if� clause indicating a hypoth...

Pl help

Hi For any integer k > 1, the term “length of an integer� refers to the number of positive prime factors, not necessarily distinct, whose product is equal to k. For example, if k = 24, the length of k is equal to 4, since 24 = 2 × 2 × 2 × 3. If x and y are positive integers such that x > 1, y...