Why numerical computation solves real problems in MATLAB - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to calculate the square root of 16.

MATLAB

result = sqrt([1]);

Drag options to blanks, or click blank then click option'

A4

B16

C8

D25

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong number inside sqrt, like 25 or 8.

The sqrt function calculates the square root of the input number. Here, the square root of 16 is 4.

2fill in blank

medium

Complete the code to create a vector from 1 to 5.

MATLAB

vec = [1];

Drag options to blanks, or click blank then click option'

A1:10

Blinspace(1,10,5)

C[5 4 3 2 1]

D1:5

Attempts:

3 left

💡 Hint

Common Mistakes

Using 1:10 creates a longer vector than needed.

The colon operator 1:5 creates a vector with values from 1 to 5.

3fill in blank

hard

Fix the error in the code to compute the sum of elements in vector v.

MATLAB

total = [1](v);

Drag options to blanks, or click blank then click option'

Asum

Badd

Cplus

Dtotal

Attempts:

3 left

💡 Hint

Common Mistakes

Using add or plus which are not functions for summing vectors.

The sum function adds all elements of the vector v.

4fill in blank

hard

Fill both blanks to create a vector of squares of numbers 1 to 5.

MATLAB

squares = ([1]:[2]).^2;

Drag options to blanks, or click blank then click option'

A1

B2

C5

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong start or end values like 2 or 10.

The colon operator 1:5 creates numbers from 1 to 5. Squaring each gives the squares vector.

5fill in blank

hard

Fill all three blanks to create a vector of even numbers from 2 to 10.

MATLAB

evens = [1]:[2]:[3];

Drag options to blanks, or click blank then click option'

A1

B2

C10

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using step 1 instead of 2, or wrong start/end values.

The syntax start:step:end creates a vector starting at 2, stepping by 2, up to 10, giving even numbers.