Which of the following sentences uses the superlative form correctly?

Choose the correct comparative form of the adjective 'happy'.

What is the superlative form of the adjective 'bright'?

Which sentence correctly uses the comparative form of the adjective 'fast'?

Select the correctly formed comparative adjective in the following sentence: 'This math problem is _____ than the last one.'

Identify the correct superlative form of the adjective 'big'.

Which of the following sentences correctly uses a superlative adjective?

What is the correct comparative form of the adjective 'interesting'?

Which of the following sentences correctly uses the superlative form of the adjective 'funny'?

Which is the correct comparative form for the adjective 'easy'?