CAT Practice Question and Answer
8Q: In a family, each daughter has the same number of brothers as she has sisters and each son has twice as many sisters as he has brothers. How many sons are there in the family ? 2291 05b5cc723e4d2b4197774f6be
5b5cc723e4d2b4197774f6be- 11false
- 22false
- 33true
- 44false
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Answer : 3. "3"
Explanation :
Answer: C) 3 Explanation: Assume the family has X girls and Y boys, according to the question,we can have 2 equations:X-1=Y, 2(Y-2)=X.Solve the equations, we get X=4, Y=3.
Q: Last year vivek saved 10% of his annual earnings, this year he earned 5% more than last year and he saved 12% of his annual earnings. The amount saved this year was what percentage of the amount saved last year ? 2290 05b5cc723e4d2b4197774f6c3
5b5cc723e4d2b4197774f6c3- 187%false
- 298%false
- 3138%false
- 4126%true
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Answer : 4. "126%"
Explanation :
Answer: D) 126% Explanation: Suppose total earnings = Rs. 1000010% saving = 10000 x (10/100) = Rs. 1000This year 5% more income than prev year = Rs. 1050012% saving = 10500 x (12/100) = Rs. 1260Percentage of amount saved = (1260/1000) x 100 = 126%
Q: Calculate the number of bricks, each measuring 25 cm x 15 cm x 8 cm required to construct a wall of dimensions 10 m x 4 cm x 6 m when 10% of its volume is occupied by mortar ? 2287 05b5cc6d8e4d2b4197774e76e
5b5cc6d8e4d2b4197774e76e- 1720true
- 2600false
- 3660false
- 46000false
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Answer : 1. "720"
Explanation :
Answer: A) 720 Explanation: Let the number of bricks be 'N' 10 x 4/100 x 6 x 90/100 = 25/100 x 15/100 x 8/100 x N 10 x 4 x 6 x 90 = 15 x 2 x N => N = 720.
Q: Name the two main types of Fermentation? 2287 05b5cc696e4d2b4197774c56f
5b5cc696e4d2b4197774c56f- Show AnswerHide Answer
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Answer :
Explanation :
Fermentation is the chemical breakdown of a substance by bacteria, yeasts, or other microorganisms, typically involving effervescence and the giving off of heat. The two most common types of fermentation are (1) alcoholic fermentation (and) (2) lactic acid fermentation. (1) Alcoholic fermentation : the type of fermentation in which ethyl alcohol is the main end product .This is very common in yeast (unicellular fungus) and also seen in some bacteria. Yeast cells release enzymes called zymase complex which bring about the fermentation. The reactions are similar to anaerobic respiration. (2) Lactic acid fermentation : The type of fermentation in which lactic acid is the end product. It is carried out by some bacteria (e.g. lactic acid bacteria), and also by animals (muscle glycolysis in animals, under oxygen deficiency, results in the formation of lactic acid this is whay we experience in muscle cramps, or "Charley horse").
Q: Population of a colony of mosquitoes is increasing by 20% per day. If the population on Monday was 3000, on which day of that week the population would be 5184 ? 2286 05b5cc73ae4d2b4197774f8f1
5b5cc73ae4d2b4197774f8f1- 1Thursdaytrue
- 2Fridayfalse
- 3Tuesdayfalse
- 4Mondayfalse
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Answer : 1. "Thursday"
Explanation :
Answer: A) Thursday Explanation: Given monday population = 3000Per day 20% increase in population. Tuesday population = 3000 + 3000x20/100 = 3000 + 600 = 3600 Wednesday population =3600 + 3600x20/100 = 3600 + 720 = 4320 Thursday population = 4320 + 4320x20/100 = 4320 + 864 = 5184 So that day is Thursday.
Q: Who is the author of the book "No Full Stops in India" ? 2286 15b5cc6cee4d2b4197774e265
5b5cc6cee4d2b4197774e265- 1R. K. Narayanfalse
- 2Mark Tullytrue
- 3C. Narayan Reddyfalse
- 4Ved Mehtafalse
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Answer : 2. "Mark Tully"
Explanation :
Answer: B) Mark Tully Explanation:
Q: If the given two numbers are respectively 7% and 28% of a third number, then what percentage is the first of the second ? 2286 05b5cc75ce4d2b4197774fc48
5b5cc75ce4d2b4197774fc48- 124%false
- 229%false
- 334%false
- 425%true
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Answer : 4. "25%"
Explanation :
Answer: D) 25% Explanation: Here, k = 7 and l = 28Therefore, first number = klx100 % of second number = 7/28 x 100% of second number = 25% of second number.
Q: In MS-Word, for what does ruler help? 2285 15b5cc69ce4d2b4197774c846
5b5cc69ce4d2b4197774c846- 1to set indentsfalse
- 2to change page marginsfalse
- 3to set tabsfalse
- 4All the abovetrue
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Answer : 4. "All the above"
Explanation :
Answer: D) All the above Explanation: In MS-Word, the Ruler function helps align the text, graphic, tables or other elements in your document.