Question Details

Find the approximate value that should replace the question mark (?) in the equation below (note that an exact calculation is not required).

44.44÷4.4÷10.1=(?)2÷100

Options

A

25

B

15

C

14

D

10

E

20

Show Answer

Correct Answer :

Option D

10

Solution :

The correct option is 10.

We are asked to find the approximate value of the question mark (?) in the following equation:

44.44 ÷ 4.4 ÷ 10.1 = ( ? ) 2 ÷ 100

Step 1: Approximate the numbers to simplify calculations.
Let us round off the numbers to their nearest manageable values:
- 44.44 can be approximated as 44
- 4.4 can be approximated as 4.4 (or notice that 44.44÷4.4=10.1 directly)
- 10.1 can be approximated as 10

Step 2: Evaluate the left side of the equation.
Calculating exact division on the left-hand side:
First, 44.44÷4.4=10.1
Next, divide by 10.1:
10.1÷10.1=1

Step 3: Substitute back into the equation to solve for (?).
Now the equation becomes:
1 = ( ? ) 2 ÷ 100

Multiplying both sides by 100:
( ? ) 2 = 100

Taking the square root on both sides:
? = 100 = 10

Hence, the approximate value that replaces the question mark is 10.

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