General Strategies

• Combine digits: Look for adjacent numbers that can be joined together to make a larger 2-digit or 3-digit number (e.g., combining 2 and 6 to make 26).
• Spot square numbers: Keep an eye out for perfect squares (like 4, 9, 16, or 25) so you can use the square root (√) operator.
• Check for divisibility: Look for numbers or multi-digit combinations that divide cleanly by the digit immediately following them.
• Starting with a negative: You can start the equation with a - sign to represent a negative number
• Backspace: Use DEL to remove the last thing entered, use AC to clear the window

Star Tiers

• ★ First Star (Easy): Generally solvable with basic arithmetic (+, -, ×, ÷).
• ★★ Second Star (Medium): May require 2-digit numbers or parentheses to adjust operator precedence.
• ★★★ Third Star (Hard): May require square roots (√), powers (^), or combining 3 digits together.


• Multiple solutions: Remember that there is often more than one valid equation to solve each target!