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The number that should be added to $− 3 8$ to get $512$ is:

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1824

1724

1924

2924

answer is C.

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Detailed Solution

Given a rational number

− 3 8

.
Let the number = x,

− 3 8 + x = 512 x = 512 − − 3 8

L.C.M of 12 and 8 = 24.
Now, taking the L.C.M of denominator

x = 10 + 9 24 x = 1924

The number is

1924

.
Hence, option 3 is correct.

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