This is based on Countdown's number round, where the objective is to use a combination of the 6 numbers shown to try to make the larger number at the top.

Unlike TV's Countdown, every puzzle is solvable, and the permitted operators are different

• Add (3 + 2 = 5)
• Subtract (3 - 2 = 1)
• Bitshift left (3 << 2 = 12)
• Bitshift right (9 >> 1 = 4)
• Parentheses () to help the parser understand your calculation
• Spaces, newlines, and tabs can be used to make your solution more readable

Each number may be used once, though a solution doesn't necessarily have to use all the available numbers.

Bidmas/Bodmas applies with a little modification

• Brackets have the highest precedence
• Addition and subtraction have the next highest precedence
• Bit shifts have the lowest precedence
• Operators of equal precedence are parsed from left to right

Enter your solution in the textbox above, and click the "Check solution" button to see if you're correct.

For example, if your target was 437, and you had the numbers 75, 100, 5, 2, 2, and 4, you could solve the puzzle as follows