Search found 49 matches


Triangle

In the figure, point D divides side BC of triangle ABC into segments BD and DC of lengths 1 and 2 units respectively. Given that �ADC = 60º and �ABD = 45º, what is the measure of angle x in degrees? (Note: Figure is not drawn to scale.) (A) 55 (B) 60 (C) 70 (D) 75 (E) 90 My question is that isn'...

by sampath

Sat Aug 20, 2011 9:36 am
Forum: Problem Solving
Topic: Triangle
Replies: 1
Views: 1580

Compound Interest

A total of $1000 was invested at compounded annual interest rate. At the end of 12 years, the total value will be $4000. How many years are needed to reach a total of $8,000?

OA given is 18

by sampath

Fri Aug 19, 2011 1:51 am
Forum: Problem Solving
Topic: Compound Interest
Replies: 1
Views: 2128

Simple Interest

Someone invested x dollars at simple annual interest, and the investment, including interest will be doubled in 8 and 1/3 years. What will be the total amount of the investment after 25 years?

OA given is 4X

by sampath

Fri Aug 19, 2011 1:50 am
Forum: Problem Solving
Topic: Simple Interest
Replies: 2
Views: 1716

Perimeter

Is the perimeter of a triangle greater than 1?
(1) Two of the heights are less than 1/3
(2) One of the heights is greater than 1/2

OA is B

by sampath

Fri Aug 19, 2011 1:49 am
Forum: Data Sufficiency
Topic: Perimeter
Replies: 1
Views: 1359

Widgets

Two types of widgets, namely type A and type B, are produced on a machine. The number of machine hours available per week is 80. How many widgets of type A must be produced? (1) One unit of type A widget requires 2 machine hours and one unit of type B widget requires 4 machine hours. (2) Every week,...

by sampath

Wed Aug 17, 2011 2:37 am
Forum: Problem Solving
Topic: Widgets
Replies: 1
Views: 1519

Rectangled

The sides of a rectangle are all produced in order, in such a way that the length of each side is increased by k times itself. The area of the new quadrilateral formed becomes 2.5 times the area of the original rectangle.

The value of k is:
(A) 1/3 (B) 1/4 (C) 1/2 (D) 2/3 (E) 1/5

by sampath

Wed Aug 17, 2011 2:37 am
Forum: Problem Solving
Topic: Rectangled
Replies: 6
Views: 3160

Sets Problem

The Mathematics Club in a school held an open house on three afternoons. 115, 75 and 110 students attended on the first, second and third afternoons respectively. 30 attended only on the first day, 35 on the first and second days. 70 attended the first and the third days and 35 attended on the secon...

by sampath

Wed Aug 17, 2011 2:36 am
Forum: Problem Solving
Topic: Sets Problem
Replies: 4
Views: 1561

Mean Changes

X is the average price of 10 items of which no two cost the same. If each of the cheapest 5 items loses 10% in price while each of the most expensive 5 items gains 10% in price, which of the following is possible about ?
I. X will decrease
II. X will not change
III. X will increase

by sampath

Sun Aug 14, 2011 11:30 am
Forum: Problem Solving
Topic: Mean Changes
Replies: 4
Views: 1054

Number N

If 0 ≤ n ≤ 9, what is the value of n?
(1) Tenth unit of 1/n is zero

(2) unit digit of 1/n ≥ n

OA is D but I don't know how to solve this question. Thanks.

by sampath

Sat Aug 13, 2011 12:47 am
Forum: Data Sufficiency
Topic: Number N
Replies: 2
Views: 754

Functions

f(x) is a function for all real number, is f(x^2) ≤ (f(x))^2 ?
(1) f(x) ≤ 0

(2) If x ≥ 0, f(x) = -x, if x < 0, f(x) = x.

OA is D

by sampath

Fri Aug 12, 2011 10:36 pm
Forum: Data Sufficiency
Topic: Functions
Replies: 2
Views: 758

Median series

Is d ≥ 0?
(1) d is the median of d, 1/d, -d
(2) d^3 is the median of d, d^2, d^3

OA is E but I think the answer should be B as the only value of d that satisfies stmt 2 is d=-1/2 which is less than 0.

by sampath

Fri Aug 12, 2011 9:51 pm
Forum: Data Sufficiency
Topic: Median series
Replies: 2
Views: 781

Range and SD

Set S and T have 100 numbers, respectively. Is standard deviation of S greater than or less than that of T?
(1) Range of S is greater that of T (2) Average of S is greater than that of T

OA given is E

by sampath

Fri Aug 12, 2011 9:45 pm
Forum: Data Sufficiency
Topic: Range and SD
Replies: 7
Views: 3928

Mean Difference

Sequence A consists of 10 consecutive odd numbers and B consists of 5 consecutive even numbers. If the least number in A is 7 greater than the least number in B, the average of the numbers in A is how much greater than average of numbers in B? OA given is 14 but I think the answer should be 12 . Tha...

by sampath

Fri Aug 12, 2011 9:44 pm
Forum: Problem Solving
Topic: Mean Difference
Replies: 2
Views: 1102

I don't think thats the correct approach for this question

by sampath

Fri Aug 12, 2011 9:16 pm
Forum: Sentence Correction
Topic: Charges
Replies: 3
Views: 776

Hi Sumg Though the OA given is C, I think the answer should be A Since from the first stmt, the only possible value of K that satisfies the condidition is K=7 From Stmt 2: there are two possible values of K<10 which can be either K=2 or K=4. Could you please confirm whether my reasoning is correct. ...

by sampath

Fri Aug 12, 2011 8:10 pm
Forum: Data Sufficiency
Topic: Remainder
Replies: 6
Views: 1474