Interactive practice questions
$0\times4$0×4
Easy
< 1min
$4\times0$4×0
Easy
< 1min
$1\times4$1×4
Easy
< 1min
$4\times1$4×1
Easy
< 1min
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$0\times4$0×4
$4\times0$4×0
$1\times4$1×4
$4\times1$4×1