What value should come in the place of question mark (?) in the following equation?

(0.004 ÷ ?) + (0.002 ÷ 0.02) - (0.03 ÷ 0.3) = 0.1

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OSSC CGL 2022 Official Paper (Held on: 17th Oct Shift 2)
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  1. 0.4
  2. 0.001
  3. 0.04
  4. 0.004

Answer (Detailed Solution Below)

Option 3 : 0.04
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Detailed Solution

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Given:

(0.004 ÷ ?) + (0.002 ÷ 0.02) - (0.03 ÷ 0.3) = 0.1

Calculation:

(0.004 ÷ ?) + (0.002 ÷ 0.02) - (0.03 ÷ 0.3) = 0.1

Let us replace '?' as 'x'

⇒ (0.004 ÷ x) + (0.002 ÷ 0.02) - (0.03 ÷ 0.3) = 0.1

⇒ (0.004 ÷ x) + (0.1) - (0.1) = 0.1

⇒ 0.004 ÷ x = 0.1

⇒ \(4 \over 1000\)  = \(1 \over 10\)x

⇒ \(40 \over 1000\) = x

⇒ \(1 \over 25\) = x

⇒ x = 0.04

The value that should come in the place of '?' is 0.04.

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