EduFarming
Your list · 0हिं

Type at least two letters. Press Esc to close.

↑↓ navigate↵ openTAB cycle filter

Simplification & Approximation · Question 68 of 71

Question 68

MediumOriginal question

What is (39.97% of 249.9)−4.982(39.97\% \text{ of } 249.9) - 4.98^2 approximately equal to?

Options for question 68

Show the answer and explanation
CorrectNot quiteAnswer A

Correct answer: A

Explanation

  1. 40%40\% of 250=100250 = 100.

  2. 4.982≈52=254.98^2 \approx 5^2 = 25.

  3. 100−25=75100 - 25 = 75.

Worth noting

The bracket shows the percentage is taken of 249.9 only; then 4.9824.98^2 is subtracted. The exact value is about 75.2.

Concept
Estimating with a percentage and a square
Typical time
50 s
Your time
—
The rule this testsApproximation
Practise this chapter →

Ten questions from Simplification & Approximation, at your own pace.

Practise this chapter →

Ten questions from Simplification & Approximation, at your own pace.