Category Archives: Math

Lesson Links: Mean, median and mode averages

Basic lesson and practice on averages:

There are a couple types of tricky problems related to averages that often show up on the SHSATs:

Finding the average from a frequency table:
Practice 1:
Practice 2- don’t worry about the second half of the page, which is more advanced:

Missing numbers in averages:
Lesson/ practice 1:
Practice 2:

Divisibility, prime factorization, GCF and LCM

You are likely to encounter one or two divisibility questions on the SHSAT.  The good news is that most of them are straightforward greatest common factor or least common multiple problems. If you don’t know how to find GCF and LCM using prime factorization, check out one of the first three links at the bottom of the page. This post is about understanding divisibility a little deeper. Continue reading