If a is a non-zero digit in the numbers $1 a 2 a$ and $a 31$ , what is the value of a when $1 a 2 a + a 31 = 2659$ ?

8

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7

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2

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6

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Solution

The correct option is A $8$
$1 a 2 a + a 31 = 2659$
$∵ a + 1 = 9$
$∴ a = 9 - 1$
$\Rightarrow a = 8$
Then $1828 + 831 = 2659$

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Similar questions

A = ⎡ ⎢ ⎣ \begin{matrix} 1 & 2 & 3 1 & 1 & 5 2 & 4 & 7 \end{matrix} ⎤ ⎥ ⎦

a_{31} A_{31} + a_{32} A_{32} + a_{33} A_{33}

A_{1}, A_{2}, . . . . . A_{31}

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x^{4} + x^{2} (2 - 3^{\frac{1}{2}}) + 2 + 3^{\frac{1}{2}} = 0

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a2=31/4 a31=1/2 an =-30/2 find n

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