Arithmetic operators in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add two numbers and print the result.

Ruby

result = 5 [1] 3
puts result

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

A*

B-

C/

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-' subtracts instead of adding.

Using '*' multiplies instead of adding.

The + operator adds two numbers together.

2fill in blank

medium

Complete the code to multiply two numbers and print the result.

Ruby

result = 4 [1] 7
puts result

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

A+

B-

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using '+' adds instead of multiplying.

Using '/' divides instead of multiplying.

The * operator multiplies two numbers.

3fill in blank

hard

Fix the error in the code to correctly divide two numbers and print the result.

Ruby

result = 10 [1] 2
puts result

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

A/

B+

C-

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using '*' multiplies instead of dividing.

Using '-' subtracts instead of dividing.

The / operator divides the first number by the second.

4fill in blank

hard

Fill both blanks to calculate the remainder of division and print it.

Ruby

result = 17 [1] 5
puts result.to_s [2] " remainder"

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

A%

B+

C-

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-' or '*' instead of '%' for remainder.

Using '-' or '*' instead of '+' for concatenation.

The % operator gives the remainder of division. The + operator is used here to concatenate the result with a string.

5fill in blank

hard

Fill all three blanks to create a hash with keys as numbers and values as their squares, but only for numbers greater than 3.

Ruby

squares = (1..5).select { |[3]| [3] > 3 }.map { |[3]| [ [1], [2] ] }.to_h

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

Ax

Bx * x

Dy

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names inconsistently.

Using incorrect operators for multiplication.

We use x as the key, x * x as the value, and iterate with x over the range. The condition filters numbers greater than 3.