Question Details

Estimate the value that should replace the question mark (?) in the mathematical expression below (calculating the precise value is not required):

22.112+199.98?=29.89% of 400.02

Options

A

492

B

720

C

666

D

608

E

564

Show Answer

Correct Answer :

Option E

564

Solution :

The correct option is 564.


To estimate the value of the question mark (?), we can round each number in the given mathematical expression to its nearest whole number or convenient value for easy calculation.

Given expression:

22.112+199.98?=29.89% of 400.02


Now, let us approximate each term:

1. 22.1122

2. 199.98200

3. 29.89%30%

4. 400.02400


Substitute these rounded values back into the expression:

222+200?=30% of 400


Step 1: Calculate the square of 22.

222=484


Step 2: Calculate 30% of 400.

30% of 400=30100×400=30×4=120


Step 3: Substitute these results into the equation.

484+200?=120

684?=120


Step 4: Solve for ?.

?=684120

?=564


Hence, the estimated value that should replace the question mark is 564.

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