DS-Arithmetic : Crackverbal Support

DS-Arithmetic

DS Questions from Arithmetic

Jack is standing in line. If there are 8 more people in front of Jack than behind him, how many people are in line? (1) There are 4 people behind Jack. (2) There are three times as many people in front of Jack as behind him.

CONCEPT: The question tests on the basics of decision making and linear arrangement SOLUTION: Using Statement (1)- There are 8 more people in front o...

Tue, 12 Oct, 2021 at 4:44 PM

A school administrator will assign each student in a group of N students to one of M classrooms. If 3<N, is it possible to assign each of the N students to one of the M classrooms so that each classroom has the same number of students

CONCEPT: The question tests on the application of factors and divisibility in the DS question here. We are glad that you are practicing so hard and doub...

Tue, 12 Oct, 2021 at 4:44 PM

If x, y, and z are three-digit positive integers and if x = y + z, is the hundreds digit of x equal to the sum of the hundreds digits of y and z ? (1) The tens digit of x is equal to the sum of the tens digits of y and z. (2) The units dig

CONCEPT: The question here tests the application ability in the area of Operations on Numbers. Pls find the Video solution attached here.

Tue, 12 Oct, 2021 at 4:44 PM

A clothing manufacturer makes jackets that are wool or cotton or a combination of wool and cotton. The manufacturer has 3,000 pounds of wool and 2,000 pounds of cotton on hand. Is this enough wool and cotton to make at least 1,000 jackets?

From Statement(1) ALONE we can deduce that 3000/4=750 wool jackets but we are DO NOT KNOW if the remaining 250 jackets can be manufactured by the 2000 pound...

Tue, 12 Oct, 2021 at 4:45 PM

Did the population of Town C increase by at least 100 percent from the year 2000 to the year 2010 ? (1) The population of Town C in 2000 was 2/3 of the population in 2005. (2) The population of Town C increased by a greater number of peopl

From Statement (1)-Suppose population in Town C was 180 in 2005, Population in 2000= 180∗2/3= 120 We have the range 2000-2005 not 2000-2010 (Insufficient...

Tue, 12 Oct, 2021 at 4:45 PM

Are all of the numbers in a certain list of 15 numbers equal? (1) The sum of all the numbers in the list is 60. (2) The sum of any 3 numbers in the list is 12.

CONCEPT: The question tests the ability to interpret overlap of set elements using logic. SOLUTION: The solution is attached here as a video attachment.

Tue, 12 Oct, 2021 at 4:45 PM

List T consist of 30 positive decimals, none of which is an integer, and the sum of the 30 decimals is S. The estimated sum of the 30 decimals, E, is defined as follows. Each decimal in T whose tenths digit is even is rounded up to the near

CONCEPT: The question tests ability to maximize/minimize the inputs of a question critically. SOLUTION: The solution video is attached here.

Tue, 12 Oct, 2021 at 4:45 PM

For a basic monthly fee of F yen, Noako's first cell phone allowed him to use a maximum of 420 minutes on calls during the month. Then, for each of x additional minutes he used on calls, he was charged M yen, making his total charge for the

Concept: The question tests on the application of basic arithmetic in a Word problem format. Solution: St (1) Given – There is an additional 30 minutes ...

Tue, 12 Oct, 2021 at 4:45 PM

At a bakery, all donuts are priced equally and all bagels are priced equally. What is the total price of 5 donuts and 3 bagels at the bakery? (1) At the bakery, the total price of 10 donuts and 6 bagels is $12.90. (2) At the bakery, the pr

Concept: The question tests on the basics of equations in the format of a Word Problem in DS Solution: Let the price of each donut be a$ and that of a bag...

Tue, 12 Oct, 2021 at 4:45 PM

There are 2 groups of students who took a history test. Was the average (arithmetic mean) score of the students in Group A higher than the average score of the students in Group B who took the test? (1) Of the students who took the test, 1

Concept: The question tests on the application of the knowledge of averages. Solution: Let there be x students in Group A and y students in Group B. Let...

Tue, 12 Oct, 2021 at 4:46 PM