FIGURE IT OUT · MATH
The internet still can't agree on 6 ÷ 2(1+2).This is the game that proves whether you actually get it. Four 4s, every operator you know — can you build all 100?
GeoProwl
0 / 100
TARGET #2 / 100
TARGET
2
VALUE
—
Build an expression using four 4s
YOUR EXPRESSION
tap 4 to start…
FOURS0/4
Match the target to share
Download worksheet (PDF)
Progress · tap a number to jump
Operator reference+ − · add and subtract
× ÷ · multiply and divide
^ · power (4^4 = 256)
( ) · grouping for PEMDAS
! · factorial (4! = 24)
√ · square root (√4 = 2)
% · modulo / remainder (44 % 8 = 4)
. · decimal (.4 = 0.4)
Multi-digit: 44 uses two 4s, 444 three.
Goal: every expression must use the digit 4 exactly four times and evaluate to the target.
About this puzzle: The Four Fours problem is a classic recreational-mathematics challenge dating to the late 1800s — deceptively simple, genuinely hard once you're past the easy targets. Most adults stall somewhere in the 20s. It's also a staple of grades 4–8 classrooms because it builds order-of-operations fluency (CCSS 5.OA.A.1 and 6.EE.A.1), mental arithmetic, and creative problem-solving.
Stuck? Read the solutions & strategy guide, or head back to Figure It Out.

About Four Fours

Four 4s, every operator you know — addition, subtraction, multiplication, division, exponents, factorials, square roots, decimals, concatenation — build an expression that equals each target from 1 to 100. It's a classic recreational-math puzzle that doubles as one of the best order-of-operations drills available, since getting the answer wrong almost always traces back to a PEMDAS mistake, not a wrong idea.

Some targets are easy (4 + 4 + 4 + 4 = 16 in a dozen ways); others are notoriously stubborn — if a number is giving you trouble, the solutions guide below has worked answers.

Keep Exploring

Worksheets, solutions, and classroom tips

Order of Operations Game: The Four Fours Challenge (Grades 4–8)

PEMDAS fluency and number sense, with a printable worksheet and differentiation tips.

Four Fours Solutions: How to Make Every Number 1–100

Stuck on a number? Worked solutions for 1–10 and the operators that unlock the rest.