# PHP Math functions - Exercises, Practice, Solution

## PHP Math functions [ 12 exercises with solution]

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1. Write a PHP script to find the maximum and minimum marks from the following set of arrays.
Sample arrays :
\$marks1 = array(360,310,310,330,313,375,456,111,256);
\$marks2 = array(350,340,356,330,321);
\$marks3 = array(630,340,570,635,434,255,298);
Expected Output :
Maximum marks : 635
Minimum marks : 111
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2. Write a PHP script which rounds the following values with 1 decimal digit precision.
Sample values and Output :
1.65 --> 1.7
1.65 --> 1.6
-1.54 --> -1.5
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3. Write a PHP script to generate random 11 characters string of letters and numbers.
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4. Write a PHP script to convert scientific notation to an int and a float.
Sample scientific notation : 4.5e3
Expected Output : 4 & 4500
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5. Write a PHP script to convert a date from yyyy-mm-dd to dd-mm-yyyy.
Sample floating value : 0.0456
Expected Output :
Exponent part : -4
Mantissa part : 0.7296
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6. Write a PHP script to get the information regarding memory usage in KB or MB etc.
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7. Write a PHP script to find earliest and latest dates from a list of dates.
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8. Write a PHP function to round a float away from zero to a specified number of decimal places.
Sample Data :
(78.78001, 2)
(8.131001, 2)
(0.586001, 4)
(-.125481, 3)
-.125481
Sample Output :
78.79
8.14
0.5861
-0.126
-1
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9. Write a PHP function to convert Arabic Numbers to Roman Numerals.
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10. Write a PHP function to get random float numbers.
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11. Write a PHP function to create a human-readable random string for a captcha.
Sample Output :
hoboh
tynzh
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12. Write a PHP function to get the distance between two points on the earth.
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PHP Code Editor:

More to Come !

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