Hey all,
My exam is coming up soon and there are some specific questions that I am having trouble understanding.
I would really appreciate someone explaining the two questions below. Thank-you.
===============================================
Is the integer n a multiple of 15?
1) n is a multiple of 20
2) n+6 is a multiple of 3
ANS : Both 1) and 2) are required
I'm particularly interested in understanding the theory behind this type of question as I've seen this type of question and I don't understand the theory.
===============================================
If 11 consecutive integers are listed from least to greatest, what is the average of the 11 integers?
1) Average of 1st 9 integers is 7
2) Average of last 9 integers is 9
ANS : Each statement alone is sufficient.
I cannot for the life of me figure out how you could figure out the average of 11 integers while only knowing the average of 9 of them.
====================
Any help at all would be great appreciated. Thank you!
My exam is coming up soon and there are some specific questions that I am having trouble understanding.
I would really appreciate someone explaining the two questions below. Thank-you.
===============================================
Is the integer n a multiple of 15?
1) n is a multiple of 20
2) n+6 is a multiple of 3
ANS : Both 1) and 2) are required
I'm particularly interested in understanding the theory behind this type of question as I've seen this type of question and I don't understand the theory.
===============================================
If 11 consecutive integers are listed from least to greatest, what is the average of the 11 integers?
1) Average of 1st 9 integers is 7
2) Average of last 9 integers is 9
ANS : Each statement alone is sufficient.
I cannot for the life of me figure out how you could figure out the average of 11 integers while only knowing the average of 9 of them.
====================
Any help at all would be great appreciated. Thank you!
