CAT Practice Question and Answer
8Q: Bacteria divide by 2031 05b5cc6a6e4d2b4197774cde8
5b5cc6a6e4d2b4197774cde8- 1Binary Fissiontrue
- 2Spirillafalse
- 3RNAfalse
- 4Fusionfalse
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Answer : 1. "Binary Fission"
Explanation :
Answer: A) Binary Fission Explanation: Bacteria divided and reproduce by Binary fission. In this process, the bacterium, which is a single cell, divides into two identical daughter cells. Binary fission begins when the DNA of the bacterium divides into two replicates.
Q: A sales boy is allowed 412 % discount on the total sales made by him plus a bonus of 14% on the sales over Rs.12,000.If his total earnings were Rs.2400, then his total sales(in Rs.) are ? 2031 05b5cc783e4d2b4197775021e
5b5cc783e4d2b4197775021e- 1Rs.60,145.23false
- 2Rs.54,285.54false
- 3Rs.52,147.85false
- 4Rs.50,589.47true
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Answer : 4. "Rs.50,589.47"
Explanation :
Answer: D) Rs.50,589.47 Explanation: Let the total earnings be Rs.x Then 412% of x + 14% of (x-12000) =2400 ⇒92×x100+14×x-12000100=2400 => x=50,589.47
Q: 1 Billion Seconds Equals to 2031 05b5cc6afe4d2b4197774d24f
5b5cc6afe4d2b4197774d24f- 134.76 yearsfalse
- 232.48 yearsfalse
- 333.31 yearsfalse
- 431.68 yearstrue
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Answer : 4. "31.68 years"
Explanation :
Answer: D) 31.68 years Explanation: We know that 1 year = 365.25 days 1 day = 24 hours 1 hour = 60 minutes 1 minute = 60 seconds => 1 Year = 365.25 x 24 x 60 x 60 Seconds But 1 billion seconds = ? 1 Year = 365.25 x 24 x 60 x 60 Seconds ? = 1000000000 Seconds ? = 1000000000365.25 x 24 x 60 x 60 years = 31. 68 years.
Q: An individual deposited 20% of 25% of 30% of what he had into his account with a bank. If he deposited Rs.750, how much was he having initially with him before depositing ? 2031 05b5cc71ee4d2b4197774f595
5b5cc71ee4d2b4197774f595- 1Rs. 38000false
- 2Rs. 47000false
- 3Rs. 50000true
- 4Rs. 35000false
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Answer : 3. "Rs. 50000"
Explanation :
Answer: C) Rs. 50000 Explanation: Let 'x' be the amount he had in the bank. => 20/100(25/100(30/100(x))) = 750 x = 750 x 8000/120 = Rs. 50000
Q: Maths Challenge 2030 05b5cc6d3e4d2b4197774e4c3
5b5cc6d3e4d2b4197774e4c3- 119false
- 238false
- 322false
- 440true
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Answer : 4. "40"
Explanation :
Answer: D) 40 Explanation: To get a pair of black rings 100 percent certain 27 blue + 17 red + 2 black = 40 rings should be taken out Then only we can get 100 % a pair of black rings.
Q: A bag contains 3 red balls, 5 yellow balls and 7 pink balls. If one ball is drawn at random from the bag, what is the probability that it is either pink or red? 2030 05b5cc6a9e4d2b4197774cef6
5b5cc6a9e4d2b4197774cef6- 12/3true
- 21/8false
- 33/8false
- 43/4false
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Answer : 1. "2/3"
Explanation :
Answer: A) 2/3 Explanation: Given number of balls = 3 + 5 + 7 = 15 One ball is drawn randomly = 15C1 probability that it is either pink or red = 7C1 + 3C115C1 = 7 + 315 = 1015 = 23
Q: A earns 50% of B's salary, B earns 80% of C's salary. If the total earnings for a month is Rs. 22000, then what is the earning for A ? 2030 05b5cc6c3e4d2b4197774dc3b
5b5cc6c3e4d2b4197774dc3b- 1Rs. 4000true
- 2Rs. 4200false
- 3Rs. 4400false
- 4Rs. 4600false
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Answer : 1. "Rs. 4000"
Explanation :
Answer: A) Rs. 4000 Explanation: Let C's salary be Rs. x Then B's salary = 80x/100 => A's salary = (50/100) * (80x/100) = 40x/100 But given total earnings in a month = 22000 => x + 80x/100 + 40x/100 = 22000 => x + 120x/100 = 22000 => x = 10000 => A's salary = 40 x 10000/100 = Rs. 4000
Q: In a 48 ltr mixture, the ratio of milk and water is 5:3. How much water should be added in the mixture so as the ratio will become 3:5 ? 2029 05b5cc6c2e4d2b4197774dbff
5b5cc6c2e4d2b4197774dbff- 124 litfalse
- 216 litfalse
- 332 littrue
- 48 litfalse
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Answer : 3. "32 lit"
Explanation :
Answer: C) 32 lit Explanation: Given mixture = 48 lit Milk in it = 48 x 5/8 = 30 lit => Water in it = 48 - 30 = 18 lit Let 'L' lit of water is added to make the ratio as 3:5 => 30/(18+L) = 3/5 => 150 = 54 + 3L => L = 32 lit.

