SSAT Middle Level Math : Equations

Study concepts, example questions & explanations for SSAT Middle Level Math

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Example Questions

Example Question #11 : Ssat Middle Level Quantitative (Math)

The difference between 30 and the product of 5 and 3 is 

Possible Answers:

\(\displaystyle 30\)

\(\displaystyle 28\)

\(\displaystyle 45\)

\(\displaystyle 15\)

\(\displaystyle 75\)

Correct answer:

\(\displaystyle 15\)

Explanation:

Order of operations says to multiply 5 and 3 first.  Thus we are looking for the difference between \(\displaystyle 30\) and \(\displaystyle \left (3\times 5\right)\) or \(\displaystyle 30\) and \(\displaystyle 15\).

\(\displaystyle 30-15=15\)

Example Question #23 : How To Do Other Word Problems

Sarah borrowed 48 books in the last six months. She returned half of them and then borrowed 9 more.  How many books does she have now?

Possible Answers:

\(\displaystyle 15\)

\(\displaystyle 24\)

\(\displaystyle 17\)

\(\displaystyle 33\)

\(\displaystyle 22\)

Correct answer:

\(\displaystyle 33\)

Explanation:

If Sarah borrowed 48 books and returned half of them, she now has

\(\displaystyle \frac{48}{2}=24\ books\)

If she then borrowed 9 more, she added 9 to the 24 she had so now she has 33.

Example Question #11 : Equations

If eight times a whole number is greater than 250 but less than 300, then the number could be

Possible Answers:

\(\displaystyle 31\)

\(\displaystyle 38\)

\(\displaystyle 35\)

\(\displaystyle 30\)

\(\displaystyle 28\)

Correct answer:

\(\displaystyle 35\)

Explanation:

One strategy for this problem is to multiply each of the answer choices by 8 and see which product falls between 250 and 300. \(\displaystyle 31 \cdot 8 = 248\) so 31 is too low.  

Thus 30 and 28 are too low as well (240 and 224, respectively).  

\(\displaystyle 38 \cdot 8 = 304\) which is too high.  

Thus 35 is the answer (280).

Example Question #14 : Ssat Middle Level Quantitative (Math)

Elaine wants to give 2 slices of pizza to each of the 14 children invited to a birthday party.  How many pizzas should she buy if each pizza has 8 slices?

Possible Answers:

\(\displaystyle 5\)

\(\displaystyle 3\)

\(\displaystyle 2\)

\(\displaystyle 1\)

\(\displaystyle 4\)

Correct answer:

\(\displaystyle 4\)

Explanation:

If Elaine wants to give 2 slices of pizza to 14 children, then she needs \(\displaystyle 2 * 14\) slices of pizza or 28 slices. 28 slices divided by the number of slice per pizza (8) will give you how many pizzas she needs.

\(\displaystyle 28\div 8 = 3.5\).  

In order to ensure she has enough pizza, she needs to round up so she needs to order 4 pizzas.

Example Question #15 : Ssat Middle Level Quantitative (Math)

When a number is doubled and the result decreased by 7, the number obtained is 11. What is the original number?

Possible Answers:

\(\displaystyle 11\)

\(\displaystyle 10\)

\(\displaystyle 9\)

\(\displaystyle 10\)

\(\displaystyle 7\)

\(\displaystyle 8\)

\(\displaystyle 11\)

Correct answer:

\(\displaystyle 9\)

Explanation:

Let's call the number \(\displaystyle x\).  So the number that is doubled is \(\displaystyle x\) which then becomes \(\displaystyle 2x\).  

That result \(\displaystyle \left(2x\right)\), is decreased by \(\displaystyle 7\) so \(\displaystyle 2x - 7\).  

That result is \(\displaystyle 11\).  

Putting it all together:

\(\displaystyle 2x - 7 = 11\)

Add 7 to both sides to get \(\displaystyle 2x = 18\).  

Then divide both sides by 2 and you get \(\displaystyle x = 9\).

Example Question #12 : Equations

\(\displaystyle 2\frac{3}{5}*3\frac{1}{4}=\)

Possible Answers:

\(\displaystyle \frac{52}{65}\)

\(\displaystyle 8\frac{9}{20}\)

\(\displaystyle 6\frac{3}{20}\)

\(\displaystyle 8\frac{1}{2}\)

Correct answer:

\(\displaystyle 8\frac{9}{20}\)

Explanation:

First, turn each fraction into an improper fraction. Then multiply.

\(\displaystyle \frac{13}{5}*\frac{13}{4}=\)

\(\displaystyle \frac{169}{20}=\)

\(\displaystyle 8\frac{9}{20}\)

The answer is \(\displaystyle 8\frac{9}{20}\).

Example Question #17 : Ssat Middle Level Quantitative (Math)

Solve for \(\displaystyle x\):

\(\displaystyle x - 45 = -14\)

Possible Answers:

\(\displaystyle x =31\)

\(\displaystyle x = - 59\)

\(\displaystyle x =-31\)

\(\displaystyle x = 59\)

\(\displaystyle x = 29\)

Correct answer:

\(\displaystyle x =31\)

Explanation:

Add 45 to both sides:

\(\displaystyle x - 45 = -14\)

\(\displaystyle x - 45 + 45 = -14+ 45\)

\(\displaystyle x = -14+ 45 = + (45-14) = 31\)

Example Question #18 : Ssat Middle Level Quantitative (Math)

Solve for \(\displaystyle x\):

\(\displaystyle x + 45 = -14\)

Possible Answers:

\(\displaystyle x = 31\)

\(\displaystyle x = 21\)

\(\displaystyle x = -31\)

\(\displaystyle x = -59\)

\(\displaystyle x = -39\)

Correct answer:

\(\displaystyle x = -59\)

Explanation:

Subtract 45 from both sides:

\(\displaystyle x + 45 = -14\)

\(\displaystyle x + 45-45= -14-45\)

\(\displaystyle x = -14-45 = -14 + (-45) = -(14 + 45 ) = -59\)

Example Question #19 : Ssat Middle Level Quantitative (Math)

Solve for \(\displaystyle x\):

\(\displaystyle x + 28 = 82\)

Possible Answers:

\(\displaystyle x = 110\)

\(\displaystyle x = 54\)

\(\displaystyle x = 100\)

\(\displaystyle x = 64\)

\(\displaystyle x = 44\)

Correct answer:

\(\displaystyle x = 54\)

Explanation:

Subtract 28 from both sides:

\(\displaystyle x + 28 = 82\)

\(\displaystyle x + 28 - 28 = 82 - 28\)

\(\displaystyle x = 54\)

Example Question #20 : Ssat Middle Level Quantitative (Math)

Solve for \(\displaystyle x\):

\(\displaystyle -6x = 72\)

Possible Answers:

\(\displaystyle x=78\)

\(\displaystyle x = -12\)

\(\displaystyle x = -432\)

\(\displaystyle x = 12\)

\(\displaystyle x=66\)

Correct answer:

\(\displaystyle x = -12\)

Explanation:

Divide both sides by \(\displaystyle -6\):

\(\displaystyle -6x = 72\)

\(\displaystyle -6x \div \left ( -6 \right )= 72\div \left ( -6 \right )\)

\(\displaystyle x= 72\div \left ( -6 \right ) = - \left ( 72\div 6 \right ) = -12\)

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