Percentage Practice Question and Answer
8 Q: The sum of weights of A and B is 80 kg. 50% of A's weight is
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64ccef6ba919c8488e304799- 120 kgtrue
- 210 kgfalse
- 325 kgfalse
- 415 kgfalse
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Answer : 1. "20 kg"
Explanation :
Let's denote the weight of A as 𝑥x kg and the weight of B as 𝑦y kg.
Given:
- 𝑥+𝑦=80x+y=80 (Sum of weights of A and B is 80 kg)
- 0.5𝑥=56𝑦0.5x=65y (50% of A's weight is 5665 times the weight of B)
We can solve these two equations to find the values of 𝑥x and 𝑦y, and then calculate the difference between their weights.
From equation 2: 0.5𝑥=56𝑦0.5x=65y Multiply both sides by 2 to get rid of the fraction: 𝑥=56𝑦×2x=65y×2 𝑥=106𝑦x=610y 𝑥=53𝑦x=35y
Now substitute this expression for 𝑥x into equation 1: 53𝑦+𝑦=8035y+y=80 83𝑦=8038y=80 Multiply both sides by 3883: 𝑦=80×38y=80×83 𝑦=30y=30
Now that we have found the weight of B, we can find the weight of A using equation 1: 𝑥+30=80x+30=80 𝑥=80−30x=80−30 𝑥=50x=50
So, the weight of A is 50 kg and the weight of B is 30 kg.
Now, let's find the difference between their weights: Difference=Weight of A−Weight of BDifference=Weight of A−Weight of B Difference=50−30Difference=50−30 Difference=20Difference=20
Therefore, the difference between their weights is 20 kg.
Q: If the purchase price of an article is equal to 80 percent of its selling price then there will be profit.
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5f75a5b0f66ef56de84ea529- 120%false
- 2false
- 324 %false
- 425 %true
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Answer : 4. "25 %"
Q: The price of an article is reduced by 25% but the daily sale of the article is increased by 30%. The net effect on the daily sale receipts is
790 060b60f03adafcb4fbcf36df5
60b60f03adafcb4fbcf36df5- 1false
- 2true
- 32 % increasefalse
- 42 % decreasefalse
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Answer : 2. "
Q: The number obtained by subtracting two-third of 75% of 600 from a number is 320, what is the original number?
783 0631090be7c72c07784688297
631090be7c72c07784688297- 1500false
- 2300false
- 3620true
- 4720false
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Answer : 3. "620"
Q: If the length of a rectangle is increased by 20% and its breadth is decreased by 20%, its area:
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5fed9a2b6ce9586a0ff932f4- 1Increases by 4%false
- 2Decreases by 4%true
- 3Decreases by 1%false
- 4Does not changefalse
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Answer : 2. "Decreases by 4%"
Q: In an exam, 3 marks are scored on the correct solution, but 2 marks are deducted on the wrong solution. If a student scores 75 questions and gets 75 marks, the correct answer is the number of questions.
775 0602cc7fda6ca4d5b0bb3d76f
602cc7fda6ca4d5b0bb3d76f- 150false
- 235true
- 330false
- 425false
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Answer : 2. "35"
Q: In an examination in which full marks were 700, A gets 20 % more than B, B gets 20 % more than C, and Cgets 15 % less than D. If A got 576 marks, then what percentage of full marks did D get?
773 0631f3242671e1904db7217c5
631f3242671e1904db7217c5- 167.22 %true
- 268.22 %false
- 365,22 %false
- 466.22 %false
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Answer : 1. "67.22 % "
Q: If the income of A is 25% more than that of B, then by what percent is the income of B less than that of A?
765 063109b0ed9ac741324b80c49
63109b0ed9ac741324b80c49- 110false
- 215false
- 320true
- 425false
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