[3/7 of {21 * (33.33% of (27 + 3) ÷ 5) - 7} - 8] = _______?
Correct answer: A. 7
- A. 7
- B. 10
- C. 15
- D. 49
Explanation
Using 33.33% as the intended approximation to 1/3, (27 + 3) ÷ 5 = 6 and 1/3 of 6 = 2. Then 21 x 2 - 7 = 35, so 3/7 of 35 - 8 = 15 - 8 = 7, giving option a. Option b, 10, commonly comes from forgetting the final subtraction of 8.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Percentages
Percentages express a quantity as parts per hundred and support calculations involving increases, decreases, discounts, commissions, taxes, and successive changes. Questions require distinguishing percentage change from percentage points and identifying the original value when a final value and its percentage change are given.
Practise Arithmetic
1,060 free Arithmetic MCQs from Mathematics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Mathematics questions like this
Mathematics is on 76 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.