Order of operations math teasers frequently go viral because they challenge how well we remember the fundamental rules of arithmetic: PEMDAS (Parentheses, Exponents, Multiplication/Division, Addition/Subtraction). By attaching simple math expressions to a relatable scenario—like ordering pizzas—these brain teasers test mental accuracy and precision.

In the graphic above, three friends sitting at a table state how much pizza they ordered using mathematical expressions:

• Girl on the Left (Blue Top): Says she ordered $2^3$.

• Boy in the Middle (Green Hoodie): Says he ordered $2 + 2 \times 3$.

• Boy on the Right (Dark Grey T-Shirt): Says he ordered $2(3 + 1)$.

By solving each expression using standard order of operations, we can determine who ordered the most.

Step-by-Step Breakdown

Let’s evaluate each math expression individually:

1. Girl on the Left (Blue Top): $2^3$

• This is an exponent problem where 2 is raised to the power of 3.

• Calculation:

  $$2^3 = 2 \times 2 \times 2 = 8$$

• Total: 8 pizzas.

2. Boy in the Middle (Green Hoodie): $2 + 2 \times 3$

• According to PEMDAS/BODMAS, multiplication must be performed before addition.

• Step 1 (Multiplication):

  $$2 \times 3 = 6$$

• Step 2 (Addition):

  $$2 + 6 = 8$$

• Total: 8 pizzas.

3. Boy on the Right (Dark Grey T-Shirt): $2(3 + 1)$

• According to PEMDAS/BODMAS, terms inside parentheses must be calculated first.

• Step 1 (Parentheses):

  $$3 + 1 = 4$$

• Step 2 (Multiplication):

  $$2 \times 4 = 8$$

• Total: 8 pizzas.

The Final Answer

It’s a three-way tie! Every single person ordered 8 pizzas, as $2^3 = 8$, $2 + 2 \times 3 = 8$, and $2(3 + 1) = 8$.

Why Order of Operations Riddles Go Viral

• Order of Operations Traps: People moving too quickly often perform addition before multiplication ($2 + 2 = 4 \times 3 = 12$), leading to lively arguments in comment sections.

• Satisfying Symmetry: The realization that three completely different mathematical expressions simplify to the exact same number provides a fun “aha!” moment.

• Great Educational Refresher: Serves as a quick, engaging way for adults and students alike to practice fundamental math concepts.