World 7-4 (Super Mario Bros.)

World 7-4 is the fourth and final level of World 7 in Super Mario Bros. and the twenty-eighth level overall in said game.

Layout
Like with World 4-4, World 7-4 consists of puzzles where the player must solve the correct path in order to move forward. In VS. Super Mario Bros. and All Night Nippon Super Mario Bros., this maze has different solutions. In Super Mario All-Stars, if the correct path is chosen, a chime sounds; if it is incorrect, a buzzer sounds. Before the first puzzle are two lifts that fall under the player's weight, with a Podoboo between them jumping out from the lava below. In order to move through the first puzzle, the player has to take the bottom path, followed by the middle path, and then the top path; taking any other path will bring the player back to the start of this puzzle. For the second puzzle, the player must take the top path with the Fire-Bar, followed by remaining in the middle path while jumping over the gaps, and then taking the top path once more; taking any other path will bring the player back to the start of this puzzle. After completing the second puzzle, the player will then have to dodge the fake Bowser's fire breath as they move forward, jumping between the gaps. The fake Bowser up ahead will throw hammers and a Podoboo will be jumping up from underneath.

In VS. Super Mario Bros. the solution to the first puzzle is more complicated: the player must take the bottom path, followed by the top path, but must drop down to the middle path where the platform for the top path ends, and then must jump back up and take the top path for the final section. For the second puzzle the player must take the bottom path, then the top path, and finally the bottom path again.

Super Mario Bros. Deluxe challenges
In Super Mario Bros. Deluxe, the player can collect five Red Coins, find a hidden Yoshi Egg, and get a medal based on their score. The Yoshi Egg is found in a Hidden Block directly to the right of the first large stone platform, and the score to beat is 16000. The Red Coin locations are:
 * Underneath the second falling platform
 * Above the entrance into the first puzzle area
 * Next to the Fire-Bar on the bottom path of the second puzzle area
 * In the third bottom path of the second puzzle area
 * Next to the fake Bowser, above where the Podoboo jumps out

Level map
Mondo 7-4 (Super Mario Bros.)