Dấu hiệu chia hết cho 11

111

121

131

141

$x\in \left\{11\right\}$

$x\in \left\{21\right\}$

$x\in \left\{22\right\}$

$x\in \left\{28\right\}$

$x\in \left\{23, 24, 25, 26, 27, 28, 29\right\}$

$x\in \left\{21, 23, 24, 25, 26, 29\right\}$

$x\in \left\{21, 23,24, 25, 26, 27, 28, 29\right\}$

$x\in \left\{21, 22, 23,24, 25, 26, 27, 28, 29\right\}$

$x\in \left\{21\right\}$

$x\in \left\{22\right\}$

$x\in \left\{23\right\}$

Đáp án khác

$x\in \left\{21, 22, 23, 24, 25, 26\right\}$

$x\in \left\{22, 23, 24, 25, 26, 27, 28\right\}$

$x\in \left\{21, 22, 23, 24, 25, 26, 27\right\}$

$x\in \left\{21, 23, 24, 25, 26, 27\right\}$

$a+b không⋮11$

$a+b ⋮11$

$a-b không⋮11$

$ka không⋮11$

$ka không ⋮11$

$a+b ⋮11$

$a-b ⋮11$

$ka⋮11$

105+77+144

70+122+7

21+91+38

121+231+341

$b ⋮11$

$b không ⋮11$

$ka không ⋮11$

$ka ⋮11$

$b⋮11$

$b không ⋮11$

$Không có giá trị nào của b thỏa mãn$

$Với mọi b$

$x ⋮11$

$x không ⋮11$

$x\in \left\{\varnothing \right\}$

$x\in Z$