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Simplification & Approximation · Question 18 of 71

Question 18

HardOriginal question

Ritika evaluates 84−4×6+384 - 4 \times 6 + 3 by working strictly from left to right, ignoring BODMAS. By how much does her answer differ from the correct value?

Options for question 18

Show the answer and explanation
CorrectNot quiteAnswer B

Correct answer: B

Explanation

  1. Ritika's way: 84−4=8084 - 4 = 80, 80×6=48080 \times 6 = 480, 480+3=483480 + 3 = 483.

  2. Correct way: 84−24+3=6384 - 24 + 3 = 63.

  3. Difference: 483−63=420483 - 63 = 420.

Worth noting

The question asks for the difference, not either value. 483 is Ritika's answer and 63 is the correct value.

Concept
Comparing a left-to-right evaluation with the BODMAS value
Typical time
90 s
Your time
—
The rule this testsOrder of operations (BODMAS)
Practise this chapter →

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

Practise this chapter →

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