123 can be expressed as:

$10 \times 1 + 10 \times 2 + 10 \times 3$

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$100 \times 1 + 100 \times 2 + 100 \times 3$

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$100 \times 1 + 10 \times 2 + 1 \times 3$

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$1 \times 1 + 1 \times 2 + 1 \times 3$

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Solution

The correct option is C
$100 \times 1 + 10 \times 2 + 1 \times 3$

$Let the number be abc.$

$Then the general form of abc will be:$
$100 \times a + 10 \times b + 1 \times c$

$Thus, 123 = (100 \times 1) + (10 \times 2) + (1 \times 3)$

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10^{2}

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$1000 \times 2 + 100 \times 3 + 10 \times 2 + 1 \times 4$ is expressed as:

(1 \times 10^{3}) + (2 \times 10^{2}) + (3 \times 10^{0}) + (1 \times 10^{- 1}) + (2 \times 10^{- 2})

(1 \times 100) + (1 \times 10) + (1 \times 9) + (3 \times 10^{- 1}) + (6 \times 10^{- 2}) + (7 \times 10^{- 3})

(1 \times 10^{3}) + (2 \times 10^{2}) + (3 \times 10^{1}) + (4 \times 10^{0}) + (2 \times 10^{- 1}) + (3 \times 10^{- 2})

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