RRB-NTPC 2016 Mathematics
Practice subject-wise previous year questions
Question 76
Arithmetic
If 40% of a number exceeds 25% of it by 36, then the number is:
A
220B
240C
280D
260Question 77
Arithmetic
Four numbers a, b, c and d satisfy the relation (a + 2) : (b − 2) = (c + 4) : (d − 4). If a = 6, b = 8 and c = 12, find the value of d.
A
16B
18C
20D
14Question 78
Arithmetic
A student scores 75, 80 and 90 in three tests with weights 2, 3 and 5 respectively. What is the weighted average score?
A
84B
82C
83D
85Question 79
Arithmetic
The diagonals of a rhombus-shaped field are 224 m and 420 m long. What is the perimeter (in m) of the field?
A
922B
904C
952D
944Question 80
Arithmetic
The ages of two siblings add up to 44 years. If one sibling is 4 years younger than twice the other's age, what is the difference between their ages?
A
14 yearsB
8 yearsC
12 yearsD
10 yearsQuestion 81
Arithmetic
The curved surface area of a solid cylinder is numerically equal to the total surface area of another cylinder whose radius is half of the first cylinder. If the height and radius of the first cylinder are 7 cm and 4 cm, respectively, find the curved surface area of the second cylinder.
A
\(48\pi\) cm 2B
\(42\pi\) cm 2C
\(52\pi\) cm 2D
\(65\pi\) cm 2Question 82
Arithmetic
Evaluate \(24^3 + (-7)^3 + (-17)^3\)
A
8450B
8345C
8568D
8396Question 83
Arithmetic
Calculate the total amount when ₹4000 is invested at 10% compound interest per annum, compounded annually for 2 years.
A
₹4400B
₹4080C
₹4800D
₹4840Question 84
Arithmetic
A transaction code 92419 is not divisible by 13. To make it divisible by 13, the least digit should be appended at the end of the number. What is that digit?
A
2B
4C
6D
5Question 85
Arithmetic
If 5 and 10 are given, what is the third proportional to these numbers?
A
30B
25C
15D
20Question 86
Arithmetic
The largest four-digit number which when divided by 7, 6 and 10 leaves the remainder 5 in each case, is:
A
9909B
9964C
9793D
9875Question 87
Arithmetic
The average of k numbers is x. If 48 is subtracted from each of any two of the numbers, then we get (x-12) as the new average. Find the value of k.
A
10B
5C
3D
8Question 88
Arithmetic
A store sells pens and notebooks. If 3 pens and 2 notebooks cost ₹120, and 2 pens and 4 notebooks cost ₹140, what is the price of one notebook?
A
₹35.00B
₹32.50C
₹25.00D
₹22.50Question 89
Arithmetic
If the third proportional to two numbers is 32 and the second number is 16, find the first number.
A
7B
5C
8D
6Question 90
Arithmetic
The 7-digit number 32A776B is divisible by 24. What is the minimum value of (A + B)?
A
6B
2C
4D
5Question 91
Arithmetic
The sum of two positive numbers is 30 and their product is 176. The positive difference between them is:
A
7B
14C
24D
10Question 92
Arithmetic
A shopkeeper offers the following schemes on toys of the same marked price. (A) Successive discounts of 39% and 3% on any number of toys bought. (B) Successive discounts of 36%, 13% and 8% on any number of toys bought. (C) 18% discount on the first 2 toys and 41% discount on each toy thereon. (D) 5 toys free of cost on buying 7 toys. A customer wants to buy 7 toys. Which of the above schemes is the least beneficial to her?
A
AB
CC
DD
BQuestion 93
Arithmetic
The salary of an employee is increased by 5% in the first year and again by 5% in the second year. What is the overall percentage increase in the salary after two years?
A
10%B
10.25%C
11.5%D
11%Question 94
Arithmetic
A 104-metre-long train crosses another 94-metre-long train running in the same direction in 16.2 seconds. If the speed of the first train is 61 kmph, what is the speed of the second train in kmph?
A
105 km/hrB
109 km/hrC
17 km/hrD
101 km/hrQuestion 95
Arithmetic
Ravi spends 70% of his income. If his income increases by 25% and his expenditure increases by 10%, by what percentage do his savings increase?
A
Savings increase by 60%B
Savings increase by 50%C
Savings increase by 40%D
Savings increase by 30%Question 96
Arithmetic
The fourth proportional to 1.2, 4.8, and 7.15 is:
A
28.4B
28.6C
28.2D
28.8Question 97
Arithmetic
Given the data set: 12, 36, 22, 27, 31, 17. What is the median value?
A
26.5B
24.5C
22D
27Question 98
Arithmetic
The total surface area of a cube having side 86 cm is:
A
44,294 cm 2B
44,376 cm 2C
44,462 cm 2D
44,325 cm 2Question 99
Arithmetic
A quadrilateral has one diagonal of length 36 cm, and the perpendiculars from the other two vertices to this diagonal are 20 cm and 10 cm. What is the area of this quadrilateral?
A
360 cm 2B
600 cm 2C
540 cm 2D
480 cm 2Question 100
Arithmetic
During a sale, 40% of the goods are sold at a profit of 10%. Of the remaining goods, 25% are sold at a profit of 15%, and the rest are sold at a loss of 29%. If there is an overall loss of x%, find the value of x.
A
1.5B
2C
6.8D
3.5