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SAT - Most Difficult Math Problem as per MSN
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College Admissions - Diversity
SAT - New Math Formulas
ACT - New Math Formula


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SAT - Most Difficult Math Problem as per MSN

Link to MSN's SAT Math Problem:

There are certain types of questions that a student will encounter on every SAT math test. The problem MSN selected as one of the most difficult questions is actually found on every test. It is not that difficult if you know how to tackle it. Our test preparation will teach you how to solve math problems such as this one.

The average is found by taking the total divided by the number of entries.
(70p +92n)/ (n+p) = 86
70p+92n = 86 (n+p) Cross Multiply
70p+92n = 86n +86p Distribute
6n = 16p Combine Like Terms
6n / 16 = p Divide
(6n/16)/n Substitute value of p into the equation and the answer of p/n = 6/16

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College Admissions - Diversity

The Trump administration will encourage the nation’s school superintendents and college presidents to adopt race-blind admissions standards, abandoning an Obama administration policy that called on universities to consider race as a factor in diversifying their campuses, Trump administration officials said.

The reversal would restore the policy set during President George W. Bush’s administration, when officials told schools that it “strongly encourages the use of race-neutral methods” for admitting students to college.

SAT - New Math Formulas

SAT has always provided a math formula chart at the beginning of every math section. However, there are quite a few new formulas that students need to memorize in order to master the math sections.

A= P (1 + r) ^ t
The amount of money accumulated over t years can be calculated by raising (1 + r) to the t power where r represents the interest rate. Once this amount has been calculated then it is multiplied by P the amount of money initially invested.
Of course, this type of problem will be on the calculator portion of the math test.

If they ask for the continuously compounded interest, the formula used will be Pe^rt.

Half Life Decay Equation is f(t) = a .5 ^ t/h
a = initial amount
t = time (total)
h = time it takes for half the sample to decay 
t & h must be expressed in the same units

Quadratic formula is now required: -b + and - sqrt b^2 - 4ac all divided by 2a

Sum of solutions for a quadratic equation is -b/a .

ACT - New Math Formula

ACT has never provided math formulas on their tests. However, there is one noticeable formula that has been introduced into the last two tests, April & June 2018.

The area for any triangle is given by one-half the product of the lengths of two sides times the sine of their included angle. This formula is necessary when finding the area of a triangle which does not contain a right angle.
Area= 1/2 bc sin A
Area= 1/2 ab sin C
Area= 1/2 ac sin B