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Multiplication of Integers

If a is a non...

Question

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

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