## SAT Question of the Day January 25th 2013

A.

B.

C.

D.

E.

### A nice animation clarifying the concepts can be found at:

http://intermath.coe.uga.edu/tweb/gwin1-01/wood/probability/GIFs/marble1.gif

## SAT Question of the Day January 19th 2013

In the -plane, the graph of the line with equation intersects the graph of the quadratic function in exactly one point. What is the value of ?

## SAT Question of the Day Janurary 16th 2013

The scatter plot above shows the number of items purchased at a grocery store by 28 customers and the total cost of each purchase. How many of these 28 customers bought more than 10 items and spent less than \$20?

## SAT Question of the Day January 10th 2013

### P is the percent taken out of a number (in our case 75). The result is bigger than 75. 75 is the number from which the percentage is taken from and thus it is our 100%. If P percent out of 75 is bigger it must be larger than 100%. Answer A.

70% got it right out of ~170,000 – an easy question indeed.

## SAT Question of the Day January 7th 2012

If a number is chosen at random from the set, what is the probability that it is a member of the solution set of both  and ?

### and thus the answer is

52% out of ~190,000 responses – another intermediate level question

## SAT Question of the Day January 4th 2013

### Note that we could have translated the rate of work done into minutes. However, this is not recommended since it cause an inflation of the numbers (they are much bigger and thus harder to handle). We could also write work equations to describe the situation or work with ratios – this is not necessary here due to the relative simplicity of the problem.

56% got this question right out of ~200,000 – intermediate level question

## Trig Identities January 01 2013

### 4. Trig identities expressions are separated by an equal sign – that implies you can transition from left to right as well as from right to left. If you get stuck – start with the other side. All the time the expressions you write are identical somewhere in the middle you demonstrated they are equivalent.

Left side expression                            =                                            Right side equation

Left side expression –>step 1 —> step 2 —> …..last step —> Right side equation

Left side expression <– last step…. <— step 2 <— step 1 <— Right side equation

Left side expression –> step 2 —> step 3—-> last step <—- step 4 <— step 1 <— Right side equation