Henry Ernest Dudeney/Puzzles and Curious Problems/115 - The Eight Cards

Puzzles and Curious Problems by Henry Ernest Dudeney: $115$

The Eight Cards

Rearrange these cards, moving as few as possible, so that the two columns add up alike.

Can it be done?

$\begin{array} {} \boxed 1 & \boxed 3 \\ \boxed 2 & \boxed 4 \\ \boxed 7 & \boxed 5 \\ \boxed 9 & \boxed 8 \\ \end{array}$

Sources

• 1932: Henry Ernest Dudeney: Puzzles and Curious Problems ... (previous) ... (next): Arithmetical and Algebraical Problems: Various Arithmetical and Algebraical Problems: $115$. -- The Eight Cards
• 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Arithmetical and Algebraical Problems: Digital Puzzles: $139$. The Eight Cards