Category Archives: SAT

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.

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SAT Question of the Day Explained – January 4, 2015

Happy new year! Today’s SAT question of the day is a math question about stamps and envelopes.  How many more years before no one will know what those are??  Anyhow, the question is as follows:

A machine can insert letters in envelopes at the rate of 120 per minute. Another machine can stamp the envelopes at the rate of 3 per second. How many such stamping machines are needed to keep up with 18 inserting machines of this kind?

They’ve kindly underlined the first thing that we need to look at: we have a units mismatch.  One machine is in envelopes per minute, but the other is in envelopes per second. Continue reading

SAT Question of the Day Explained – December 9, 2014 – Math

Today’s SAT question of the day is a math question about some basic algebra. The answer choices are those fun roman numeral options. The question:

If x over 3 = x^2, the value of x can be which of the following?

roman numeral 1. negative 1 over 3

roman numeral 2. 0

roman numeral 3. 1 over 3

We can solve this either by doing a little algebra or by thinking it through (and testing out the answer choices).  I will show you both ways. Continue reading

SAT Question of the Day Explained – December 8, 2014 – Identifying Sentence Errors

Today’s SAT question of the day is a quick and easy writing multiple choice question about tigers.  Let’s see if you can solve this identifying sentence errors question:

The tiger usually hunts by night and feeds on a variety of animals, but it prefers fairly large prey such as deer and wild pigs.

All of the verbs match…all of the conjunctions and other sentence bits seem to be in order, too.  This simple sentence has no error!  If you don’t hear an error when you read the sentence, check each blank systematically…and if you still don’t see an error, be confident that there’s no error!