CAT Practice Question and Answer
8Q: In a mixture of milk and water the proportion of water by weight was 75%. If in 60 gm of mixture 15 gm water was added, what would be the percentage of water ? (Weight in gm) 1614 05b5cc73de4d2b4197774f943
5b5cc73de4d2b4197774f943- 180%true
- 270%false
- 375%false
- 462%false
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Answer : 1. "80%"
Explanation :
Answer: A) 80% Explanation: Water in 60 gm mixture=60 x 75/100 = 45 gm. and Milk = 15 gm. After adding 15 gm. of water in mixture, total water = 45 + 15 = 60 gm and weight of a mixture = 60 + 15 = 75 gm. So % of water = 100 x 60/75 = 80%.
Q: An alloy of copper and bronze weight 50g. It contains 80% Copper. How much copper should be added to the alloy so that percentage of copper is increased to 90%? 1614 05b5cc6aee4d2b4197774d179
5b5cc6aee4d2b4197774d179- 145 gmfalse
- 250 gmtrue
- 355 gmfalse
- 460 gmfalse
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Answer : 2. "50 gm"
Explanation :
Answer: B) 50 gm Explanation: Initial quantity of copper =80100 x 50 = 40 g And that of Bronze = 50 - 40 = 10 g Let 'p' gm of copper is added to the mixture => 50 + p x 90100 = 40 + p => 45 + 0.9p = 40 + p => p = 50 g Hence, 50 gms of copper is added to the mixture, so that the copper is increased to 90%.
Q: Find the compound interest on Rs. 2680 at 8% per annum for 2 years ? 1614 05b5cc6b4e4d2b4197774d4de
5b5cc6b4e4d2b4197774d4de- 1Rs. 664.21false
- 2Rs. 548.68false
- 3Rs. 445.95true
- 4Rs. 692.57false
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Answer : 3. "Rs. 445.95"
Explanation :
Answer: C) Rs. 445.95 Explanation: We know Compound Interest = C.I. = P1+r100t - 1 Here P = 2680, r = 8 and t = 2 C.I. = 26801 + 81002-1= 268027252-12= 26802725+12725-1= 2680 5225×225 = (2680 x 52 x 2)/625 = 445.95 Compound Interest = Rs. 445.95
Q: 3, 12, 5, ? 1614 05b5cc6b9e4d2b4197774d725
5b5cc6b9e4d2b4197774d725- 136false
- 226false
- 330true
- 424false
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Answer : 3. "30"
Explanation :
Answer: C) 30 Explanation: 332 + 3 = 12552 + 5 = 30
Q: What will be the ratio of simple interest earned by certain amount at the same rate of interestfor 4 years and 6 years ? 1614 05b5cc767e4d2b4197774fe15
5b5cc767e4d2b4197774fe15- 11:2false
- 22:1false
- 32:3true
- 43:2false
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Answer : 3. "2:3"
Explanation :
Answer: C) 2:3 Explanation: Let p be the principle amount And R% be the rate of interest Then, required ratio =P×4×R100P×6×R100 ⇒4PR6PR= 2:3
Q: World Suicide Prevention Day (WSPD) is observed every year on _______ 1613 05b5cc6c6e4d2b4197774de04
5b5cc6c6e4d2b4197774de04- 11 Septemberfalse
- 27 Septemberfalse
- 3D) is observed every year on _______ A) 1 September B) 7 September C)false
- 4is observed every year on _______ A) 1 September B) 7 September C) 9 September D) 10 Septembertrue
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Answer : 4. "is observed every year on _______
A) 1 September
B) 7 September
C) 9 September
D) 10 September"
Explanation :
Answer: D) 10 September Explanation: World Suicide Prevention Day (WSPD) is an awareness day celebrated on 10 September every year, keeping in mind the end goal to give overall commitment and action to anticipate suicides, with various activities around the world since 2003.
Q: Internet was started in India on ? 1612 05b5cc6c8e4d2b4197774def1
5b5cc6c8e4d2b4197774def1- 18 August,1994false
- 215 August,1995true
- 39 August,1995false
- 47 August,1996false
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Answer : 2. "15 August,1995"
Explanation :
Answer: B) 15 August,1995 Explanation:
Q: General Knowledge Challenge 1611 05b5cc6d3e4d2b4197774e49b
5b5cc6d3e4d2b4197774e49b- 1Afalse
- 2Bfalse
- 3Cfalse
- 4Dtrue
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Answer : 4. "D"
Explanation :
Answer: D) D Explanation: Tokyo, capital city of Japan is the most populous city in the world. Second is Delhi in India, third is Shangai in China.