Category Archives: Arithmetic

SAT Question of the Day Explained – July 30 2015 – Math, Number Concepts, Factors, Divisibility

Today’s SAT question of the day: All numbers divisible by both 4 and 15 are also divisible by which of the following?

Divisibility…what does it mean?  Just that a number can be divided evenly (no remainder) by another number.  For instance, 10 is evenly divisible by 5, but not by 7.  Got it?

Good.  Let’s tackle today’s divisibility questions.

Continue reading

SAT Question of the Day Explained – December 3, 2014 – Math

Today’s SAT Question of the Day is a math question about counting.  These simplistic questions often contain more than meets the eye – and this one is testing your knowledge of a simple rule of counting.

On the last day of a one-week sale, customers numbered 149 through 201 were waited on. How many customers were waited on that day?

I bet most of you just subtracted 149 from 201, bubbled in 52, and moved on.  But what if I told you that isn’t the answer? Continue reading

ACT Question of the Day Explained – February 3, 2014 – Math, Division

Today’s ACT math question of the day is about dividing with remainders.  The remainder, you may or may not recall, is the part “left over” when we divide one integer by another.  For instance, if I divide 4 by 3, I get 1 with 1 left over, so my answer is 1 remainder 1 or 1R1.

One more practice round before we go on to the problem: 14/6 = ? Continue reading