Arithmetic

100. M is the sum of the reciprocals of the consecutive integers from 201 to 300, inclusive. Which of the following is true? (A) 1/3 < M < 1/2 B) 1/5 < M < 1/3 (C) 1/7 < M < 1/5 (D)1/9 < M < 1/7 (E) 1/12 < M < 1/9 The correct answer : A What's the best strategy to solve this ?

Word problem

At the beginning of the year, the Finance Committee and the planning committee of a certain company each had n members, and no one was a member of both committees. At the end of the year, 5 members left the Finance Committee and 3 members left the planning Committee. How many members did the Finance...

Let me try to solve this Statement 1: I first plug 2 for x and 1 for Y 8^2 > 4^1. YES I plug -2 for x and -3 for y 1/8^-2 > 1/4^-3. NO. Hence, statement 1 is insufficient Statement 2 I plug 1 for both x and y 8 > 4. Yes I plug -1 for x and -2 for y 1/8 > 1/4^2, yes Statement 2 is sufficient. CMIW.

I thought that the statement 2 was insufficient because it could have been solved by plugging diverse numbers with the same result 12. for example (4,4,4), (1,2,9), ( 2,4,6) etc

arithmetic

156. 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 of course the statement 1 is unsufficient, but I don't know why the statement 2 is sufficiet. I have seen the explanation answer of my OG...

Could you please write down how you did simplify it ?

Arithmetic

Guys , I was really shocked when I knew that the right answer was B, because I did think that that would NOT have been B. I thought so , because since there are 3 shirts and the most expensive price > $30, whereas the least expensive price > $ 20. So the other price(the middle price) would be greate...

Could you please give me one example with the answer explanation to make me understand perfectly ?