Question
A candidate just passed by getting 100 answers correct
by attempting 200 of the total questions. Find the total number of questions in the examination if a candidate needs 40% marks. (All questions carry equal marks)Solution
Let the total number of questions be x. then, Percentage need in exam = 40% Correct answer = 100 percentage = (correct answer)/(total questions) 
100 40 = 100 x = 250 Alternate method Given that 100 ≡ 40% 1 ≡ % 250 ≡ 100% total number of questions = 250
More Percentage Questions
- What will come in place of (?) in the given expression.
(18.5 × 2) + (3.5 × 4) = ? If x + y + 3 = 0, then find the value of x3 + y3 – 9xy + 9.
40% of 50 + 50% of ? = 25% of 300 - 10% of 250
√10000 x √8100 - (50)² = √(?) + (80)²
1428 ÷ 17 = ? % of 120
- Identify x such that x% of 540 plus {1080 ÷ x of 9} × 6 gives 162
Simplify the following expression:
Simplify the expression:
(9x² - 25) / (3x + 5)
135 ÷ 3 of 5 = ? - 112
