Question 3

In the given question, out of four options, only one is correct. Write the correct answer.

The usual form of 1000a + 10b + c is
(a) abc
(b) abc0
(c) a0 bc
(d) ab0 c

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Solution

Given expanded (or generalised) form of a number is 1000a + 10b + c. Then, we have to find its usual form.
We can write it as $1000 \times a + 100 \times 0 + 10 \times b + c$
i.e. a0bc, which is the usual form.

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The standard notation of 1000a + 100b + c is

Question 26

In the following question, out of the four options, only one is correct. Write the correct answer.

The usual form for $2.03 \times 10^{- 5}$ is

(a) 0.203

(b) 0.00203

(d) 0.0000203

Question 3

In the following question, out of the four options, only one is correct. Write the correct answer:

$3^{- 2}$ can be written as:
(a) $3^{2}$
(b) $\frac{1}{3^{2}}$
(c) $\frac{1}{3^{- 2}}$
(d) $- \frac{2}{2}$

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