CHAPTER 6 / WHAT THE SAT MATH IS REALLYTESTING 245
Concept Review 3: Finding Patterns
Solve the following problems by taking advantage of repetition.- If 5 less than 28% of x^2 is 10, then what is 15 less than 28% of x^2?
- If mis the sum of all multiples of 3 between 1 and 100, and nis the sum of all multiples of 3 between 5 and
95, what is m−n? - How much greater is the combined surface area of two cylinders each with a height of 4 cm and a radius
of 2 cm than the surface area of a single cylinder with a height of 8 cm and a radius of 2 cm?
Solve each of the following problems by analyzing a sequence.- What is the units digit of 4^134?
- The first two terms of a sequence are 1 and 2. If every term after the second term is the sum of the previous
two, then how many of the first 100 terms are odd?