Railway RRB Group D Mathematics Quiz 2018. Welcome to the www.letsstudytogether.co online Railway RRB Group D section. If you are preparing Railway, RRB ALP and RRB Group D Exams 2018, you will come across a section on “General Mathematics”. Here we are providing you with “Important RRB Group D 2018 Mathematics Quiz ” based on the latest pattern of your daily practice.
This “Railway RRB Group D 2018 Mathematics Quiz “ is also important for other Railway exams such as RRB ALP & Technicians Exam 2018.
RRB Group D 2018 Mathematics Quiz | Set-9
1.A salesman is allowed a discount 5.5% on the total sales made by him plus a bonus of 0.5% on sales over Rs. 10,000. If his total earnings were Rs. 1,990, then his total sales (in Rs.) were:
A. Rs. 34,000
B. Rs. 45,000
C. Rs. 22,000
D. Rs. 32,000
Show Correct Answers
A. Rs. 34,000
Let the salesman’s total sales be Rs. (10,000 + x), then,
2. The unit digit in the product 17 × 23 × 51 × 93 is
A. 1
B. 3
C. 5
D. 7
Show Correct Answers
B. 3
Unit’s digit = 7 × 3 × 1 × 3 = 3
3.The least number that must be added to 8961 to make it exactly divisible by 84 is
A. 27
B. 57
C. 141
D. 107
Show Correct Answers
A. 27
When 8961 is divided by 84, the reminder is 57.
∴ The least number that must be added to 8961 to make it exactly divisible by 84
= (84 – 57) = 27.
4.Amar can complete a work in 30 days and Raman can complete the same work in 15 days. If both of them work together, then in 4 days what percent of the total work will be completed?
A. 15
B. 37
C. 40
D. 45
Show Correct Answers
C. 40
Work done by Amar in 1 day is 1/30th of total work
Work done by Raman in 1 day is 1/15th of the total work
According to the problem statement, work done in 4 days can be given as
⇒ work done = 4 × (1/30 + 1/15)
Hence, 4/10 of the total work will be completed
⇒ percentage of total work = 4 × 100/10 = 40%
∴ the 40% of total work will be completed in 4 days
5.The sum of three digits of a number is 15. If 198 is added to the number, the digits in the units and hundreds place are interchanged. Also, the digit at tens place is mean of the other two digits. What is the number?
9. Rajneesh covers 1/3rd of his journey at a speed of 25 km/hr and half of the rest at a speed of 45 km/hr and the rest with 10 km/hr, then find the average speed?
A. 15.5 kmph
B. 16.5 kmph
C. 10.5 kmph
D. 18.5 kmph
Show Correct Answers
D. 18.5 kmph
We know that average speed, when distance of three intervals is same is 3uvw/(uv + vw + wu)
∴ Average speed for the whole journey is 18.5 kmph
10.For an article the profit is 190% of the cost price. If the cost price increase by 10% but the selling price remains same, then profit is what percentage of selling price (approximately)?