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21. At a stadium a certain rows are to be reserved to accommodate 12 cricket players 24 football players and 32 soccer players. How many minimum rows need to be reserved if same number of players of only one category are to be seated in each rows
Answer: Option D
Explanation:Solution: Basically they are asking for the H.C.F of 12, 24 and 32 to find out the H.C.F of them
The answer is 4 WHICH IS THE MINIMUM number of rows required.
ShortCut By :: VIKAS KUMAR SINGHSolution: Basically they are asking for the H.C.F of 12, 24 and 32 to find out the H.C.F of them
The answer is 4 WHICH IS THE MINIMUM number of rows required.
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22. What is the largest number that will divide 90207, 232585 and 127986 without leaving a remainder?
Answer: Option A
Explanation:Given numbers are 90207,127986 and 232585.
To Get the greatest number which divides given numbers without leaving a remainder.
i.e find the HCF of given numbers.
90207=3*3*3*13*257
127986=2*3*83*257
232585=5*181*257
=> 257 is the largest number.
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23. A series of books were published at seven years intervals when the seventh book was issued the sum of the publications years was 13524, when the first book was published?
Answer: Option A
Explanation:x+x+7+x+14+x+21+x+28+x+35+x+42=13524
7x+147=13524 then x=1911
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24.
Answer: Option C
Explanation:Workspace
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25. Water is continuously poured from a reservoir to a locality at the steady rate of 10,000 liters per hour. When delivery exceeds demand the excess water is stored in a tank. If the demand for 8 consecutive three-hour periods is 10000, 10000, 45000, 25000, 40000, 15000, 60000 and 35000 liters respectively, what will be the minimum capacity required of the water tank (in 1000 liters) to meet the demand?
Answer: Option D
Explanation:In the period of first 3 hrs, the demand of water = 10000.
But the water poured is 10000 per hour.
Thus at the end of 3 hours, it will pour 30000 ltr, then the excess of water = 20000.
Similarly at the end of 2nd 3 hr period the excess of water 20000+20000 = 40000.
Third, 3 hrs water poured = 30000
already we have 40000 of excess water and demand 45000.
Then the excess water at the end of 3rd 3 hrs
= 40000+30000-45000
= 25000
Fourth 3 hrs. water = 25000+30000–25000
= 30000
Fifth = 30000+30000–40000
= 20000
Sixth = 20000+30000–15000=35000
Seventh = 35000+30000–60000
= 5000
Eighth = 5000+30000–35000
= 0
By analyzing the above results, we have 40000 ltrs is the highest measure of excess water.
So the minimum capacity of water tank = 40000 litres = 40
i.e. = 40
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26. Three wheels make 18, 24, 54 revolutions per minute. Each has a black mark on it. It is aligned at the start. When does it align again for the first time?
Answer: Option B
Explanation:Let the time be x minutes.
Therefore 18x 24x 54x
Hcf = 6
Therefore time = 1/6 minute ie 10 secs
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