HSPT Quantitative : Number Manipulation*

Study concepts, example questions & explanations for HSPT Quantitative

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Example Questions

Example Question #91 : Number Manipulation*

\(\displaystyle 32\) is what percent of \(\displaystyle 200\)?

Possible Answers:

\(\displaystyle 16\)

\(\displaystyle 70\)

\(\displaystyle 64\)

\(\displaystyle 8\)

Correct answer:

\(\displaystyle 16\)

Explanation:

To find a percent, divide the "is" number (\(\displaystyle 32\) is) by the "of" number (of \(\displaystyle 200\)):

\(\displaystyle 32\div 200=.16\)

Then move the decimal to the right twice to convert to a percent:

\(\displaystyle 16\) percent

Example Question #92 : Number Manipulation*

What is the difference between \(\displaystyle 13^2\) and \(\displaystyle 14^2\)?

Possible Answers:

\(\displaystyle 14\)

\(\displaystyle 30\)

\(\displaystyle 27\)

\(\displaystyle 13\)

Correct answer:

\(\displaystyle 27\)

Explanation:

\(\displaystyle 13^2=169\) and \(\displaystyle 14^2=196\). Subtract to find the difference:

\(\displaystyle 196-169=27\) 

Example Question #93 : Number Manipulation*

What number, divided by \(\displaystyle 3\), is \(\displaystyle 16\) less than the square root of \(\displaystyle 10,000\)?

Possible Answers:

\(\displaystyle 1013\)

\(\displaystyle 84\)

\(\displaystyle 252\)

\(\displaystyle 2952\)

Correct answer:

\(\displaystyle 252\)

Explanation:

First, the square root of \(\displaystyle 10,000\) is \(\displaystyle 100\), because \(\displaystyle 100\cdot100=10,000\).

Next, subtract \(\displaystyle 16\):

\(\displaystyle 100-16=84\)

Finally, multiply by \(\displaystyle 3\) to reverse the division part:

\(\displaystyle 84\cdot3-252\)

Example Question #94 : Number Manipulation*

What is \(\displaystyle 20\) percent of \(\displaystyle 150\)?

Possible Answers:

\(\displaystyle 40\)

\(\displaystyle 30\)

\(\displaystyle 25\)

\(\displaystyle 45\)

Correct answer:

\(\displaystyle 30\)

Explanation:

Multiply \(\displaystyle 150\) by the decimal version of \(\displaystyle 20\) percent:

\(\displaystyle 150\cdot0.20 = 30\)

Example Question #95 : Number Manipulation*

What is \(\displaystyle \frac{1}{3}\) of \(\displaystyle 6\) times \(\displaystyle 37\)?

Possible Answers:

\(\displaystyle 58\)

\(\displaystyle 69\)

\(\displaystyle 62\)

\(\displaystyle 74\)

Correct answer:

\(\displaystyle 74\)

Explanation:

First, do \(\displaystyle 6\) times \(\displaystyle 37\):

\(\displaystyle 6 \cdot37 = 222\)

Then, find \(\displaystyle \frac{1}{3}\) of that value:

\(\displaystyle \frac{222\cdot1}{3} = 74\)

Example Question #96 : Number Manipulation*

What is \(\displaystyle \frac{1}{2}\) of \(\displaystyle \frac{3}{4}\) of \(\displaystyle 240\)?

Possible Answers:

\(\displaystyle 90\)

\(\displaystyle 120\)

\(\displaystyle 125\)

\(\displaystyle 82\)

Correct answer:

\(\displaystyle 90\)

Explanation:

First, find \(\displaystyle \frac{3}{4}\) of \(\displaystyle 240\):

\(\displaystyle \frac{3\cdot 240}{4}=180\)

Then, find \(\displaystyle \frac{1}2{}\) of that value:

\(\displaystyle \frac{180}{2}=90\)

Example Question #97 : Number Manipulation*

What is the product of \(\displaystyle 5^2\) and \(\displaystyle 21\) less than \(\displaystyle 11^2\)?

Possible Answers:

\(\displaystyle 3025\)

\(\displaystyle 2500\)

\(\displaystyle 2750\)

\(\displaystyle 2900\)

Correct answer:

\(\displaystyle 2500\)

Explanation:

First, \(\displaystyle 11^2=11\cdot11=121\).

Then, subtract \(\displaystyle 21\):

 \(\displaystyle 121-21=100\)

Then, \(\displaystyle 5^2=5\cdot5=25\).

Finally, multiply to find the product:

\(\displaystyle 100\cdot25=2500\)

 

Example Question #98 : Number Manipulation*

What is \(\displaystyle 5\) less than \(\displaystyle \frac{1}{2}\) of \(\displaystyle 32\)?

Possible Answers:

\(\displaystyle 12\)

\(\displaystyle 11\)

\(\displaystyle 13\)

\(\displaystyle 14\)

Correct answer:

\(\displaystyle 11\)

Explanation:

First, find \(\displaystyle \frac{1}{2}\) of \(\displaystyle 32\):

\(\displaystyle \frac{1\cdot32}{2}=16\)

Then, subtract \(\displaystyle 5\):

\(\displaystyle 16-5=11\)

Example Question #99 : Number Manipulation*

What is \(\displaystyle 80\) percent of \(\displaystyle 90\)?

Possible Answers:

\(\displaystyle 81\)

\(\displaystyle 75\)

\(\displaystyle 72\)

\(\displaystyle 70\)

Correct answer:

\(\displaystyle 72\)

Explanation:

Multiply \(\displaystyle 90\) by the decimal version of \(\displaystyle 80\) percent to find the answer:

\(\displaystyle 90\cdot.80=72\)

Example Question #100 : Number Manipulation*

\(\displaystyle 69\) is what percent of \(\displaystyle 300\)?

Possible Answers:

\(\displaystyle 23\)

\(\displaystyle 215\)

\(\displaystyle 207\)

\(\displaystyle 26\)

Correct answer:

\(\displaystyle 23\)

Explanation:

To find the percent, first divide \(\displaystyle 69\) by \(\displaystyle 300\):

\(\displaystyle 69\div300=.23\)

Then move the decimal to the right two places to convert to percent form:

\(\displaystyle 23\) percent

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