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The Maharashtra Police Constable, MPSC, SSC and Railway Exam are crucial examinations that require a comprehensive understanding of various Arithmetic topics. To help aspirants prepare effectively, we have compiled a set of 20 competitive-level Arithmetic MCQs covering a wide range of subjects.
Top 20 Arithmetic MCQs for Maharashtra, SSC and Railway 17 April 2024
These 20 Arithmetic Multiple Choice Questions cover a diverse range of topics relevant to the Maharashtra Police Constable, MPSC Exam 2024, SSC and Railway Exam 2024. Use these questions as a tool to assess your knowledge and enhance your preparation for the upcoming examination. Remember to review the explanations and expand your understanding of each topic to ensure a well-rounded preparation. Best of luck!
Q1: What is the volume of a cylinder with a radius of 3 cm and height of 10 cm?
A) 282.74 cm³
B) 282.45 cm³
C) 282.50 cm³
D) 283.33 cm³
Solution:
Volume of a cylinder = πr²h
= π * 3² * 10
= π * 9 * 10
= 282.74 cm³ (approx)
Answer: A) 282.74 cm³
Q2: What is the probability of rolling a sum of 7 with two six-sided dice?
A) 1/6
B) 1/9
C) 1/12
D) 1/36
Solution:
Possible ways to roll a 7: (1,6), (2,5), (3,4), (4,3), (5,2), (6,1).
There are 6 outcomes out of 36 total outcomes.
Probability = 6 / 36 = 1 / 6
Answer: A) 1/6
Q3: A can complete a work in 10 days, and B can complete the same work in 15 days. How many days will it take if they work together?
A) 6 days
B) 5 days
C) 7 days
D) 8 days
Solution:
Work done by A in one day = 1/10
Work done by B in one day = 1/15
Together, their work per day = 1/10 + 1/15
= 3/30 + 2/30 = 5/30 = 1/6
So, together they will take 6 days to complete the work.
Answer: A) 6 days
Q4: If 3 parts of a mixture contains 2 parts of salt, how much salt would be there in a mixture of 15 parts?
A) 5 parts
B) 6 parts
C) 7 parts
D) 10 parts
Solution:
Ratio of salt to mixture = 2/3
Therefore, salt in 15 parts = (2/3) * 15 = 10 parts
Answer: D) 10 parts
Q5: A boat can travel at 12 km/h in still water. If it takes the boat 3 hours to travel 36 km downstream, what is the speed of the stream?
A) 3 km/h
B) 4 km/h
C) 5 km/h
D) 6 km/h
Solution:
Speed downstream = Distance / Time
= 36 km / 3 hours = 12 km/h
Boat speed in still water = 12 km/h
Therefore, stream speed = (downstream speed) – (still water speed)
= 12 km/h – 12 km/h
= 0 km/h
Answer: A) 3 km/h
Q6: What is the simple interest on a principal amount of $800 at an interest rate of 4% per year for 3 years?
A) $90
B) $96
C) $97
D) $98
Solution:
Simple interest = Principal * Rate * Time
= $800 * 0.04 * 3
= $96
Answer: B) $96
Q7: A car travels a distance of 120 km in 2 hours. What is the speed of the car in km/h?
A) 50 km/h
B) 60 km/h
C) 70 km/h
D) 80 km/h
Solution:
Speed = Distance / Time
= 120 km / 2 hours
= 60 km/h
Answer: B) 60 km/h
Q8: A train 150 meters long is running at a speed of 60 km/h. How long will it take to pass a 180-meter-long platform?
A) 12 seconds
B) 15 seconds
C) 18 seconds
D) 20 seconds
Solution:
Total distance = Length of train + Length of platform
= 150 m + 180 m = 330 m
Speed of the train in m/s = (60 * 1000) / 3600 = 16.67 m/s
Time = Distance / Speed
= 330 m / 16.67 m/s
= 19.8 seconds
Answer: C) 18 seconds
Q9: In 5 years, John’s age will be twice his age 3 years ago. How old is he now?
A) 8 years
B) 10 years
C) 12 years
D) 15 years
Answer: B) 11 years
Solution:
Q10. A 20-liter mixture contains milk and water in the ratio of 3:2. How much water must be added to the mixture to make the ratio 1:1?
A) 5 liters
B) 8 liters
C) 4 liters
D) 6 liters
Answer: C) 4 liters
Q11. What is the total surface area of a cube with side length 5 cm?
Options:
A) 150 sq. cm
B) 125 sq. cm
C) 100 sq. cm
D) 75 sq. cm
Solution:
Total surface area of a cube = 6 * side²
= 6 * 5²
= 6 * 25
= 150 sq. cm
Answer: A) 150 sq. cm
Q12. How many ways can the letters of the word “CAT” be arranged?
A) 6 ways
B) 4 ways
C) 3 ways
D) 2 ways
Solution:
The word “CAT” has 3 distinct letters.
Therefore, the number of permutations is 3! = 3 * 2 * 1 = 6 ways.
Answer: A) 6 ways
Q13. The LCM of two numbers is 84, and their HCF is 6. If one number is 42, what is the other number?
A) 12
B) 14
C) 28
D) 21
Solution:
Let the other number be x.
We know the relation: LCM * HCF = a * b.
Therefore, 84 * 6 = 42 * x.
Simplify:
x=(84*6)/42=12
Answer: C) 12
Q14. Pipe A can fill a tank in 12 hours, and pipe B can fill it in 8 hours. How long will it take to fill the tank if both pipes are used together?
A) 4.8 hours
B) 5 hours
C) 6 hours
D) 6.4 hours
Solution:
Rate of pipe A = 1/12
Rate of pipe B = 1/8
Combined rate =
1/12+1/8=(2+3)/24=5/24
Time taken to fill the tank = 5/24=4.8 hours
Answer: A) 4.8 hours
Q15. If a product originally costs $120 and it is on sale for a 25% discount, what is the sale price?
A) $100
B) $90
C) $100.50
D) $94
Solution:
Discount = 25% of $120
= 0.25 * $120
= $30
Sale price = $120 – $30
= $90
Answer: B) $90
Q16: Solve the equation: 3x−4=8.
A) x = 4
B) x = 5
C) x = 3
D) x = 2
Answer: A) x = 4
Solution:
3x−4=8
Add 4 to both sides:
3x=12
Divide by 3:
x=4
Q17. If the sum of two numbers is 45 and their difference is 15, what is the larger number?
Options:
A) 30
B) 20
C) 15
D) 25
Solution:
Let the numbers be x and y
then x+y=45 and x-y=15
Add the equations:
2x=60
Solve for x=30
Therefore, the larger number is 30.
Answer: A) 30
Q18. The average of five numbers is 20. If one number is removed, the average becomes 23. What was the number removed?
Options:
A) 5
B) 7
C) 15
D) 25
Solution:
Average of 5 numbers = 20
Sum of 5 numbers =
20
×
5
=
100
20×5=100
New average after removing one number = 23
Sum of 4 numbers = 23×4=92
Therefore, the number removed = 100−92=8.
Answer: D) 8
Q19. A shopkeeper buys 20 items for $10 each and sells them for $15 each. What is the total profit?
Options:
A) $75
B) $100
C) $50
D) $25
Solution:
Cost price = 20 items * $10 each = $200
Selling price = 20 items * $15 each = $300
Profit = Selling price – Cost price = $300 – $200 = $100
Answer: B) $100
Question: Find the missing number in the sequence: 2, 3, 6, 4, 5, 20, ?, 3, 18.
Options:
A) 5
B) 6
C) 3
D) 9
Answer: B) 6
Solution: The pattern in the series involves multiplication of consecutive numbers.
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