# (Papers) RRB Group D : Exam Paper & Answer Key Set-3 (Mathematics)

## (Papers) RRB Group D : Exam Paper & Answer Key Set-3

## (Mathematics)

**76. A man buys 12 articles for Rs. 12/- and sells them at the rate of Rs. 1.25 per ar- ticle. His gain percentage is**

(a) 20

(b) 25

(c) 15

(d) 18

**77. The cost price of 15 articles is same as the selling price of 10 articles. The profit per cent is:**

(a) 30%

(b) 40%

(c) 50%

(d) 45%

**78. By selling an article for Rs. 240, a man incurrs a loss of 10%. At what price should he sell it, so that he makes a profit of 20% ?**

(a) Rs. 264

(b) Rs. 288

(c) Rs. 300

(d) Rs. 320

**79. A house and a shop were sold for Rs. 1 lakh each. In this transaction, the house sale resulted into 20% loss whereas the shop sale into 20% profit. The entire transaction resulted in**

(a) no loss no gain

(b) gain of Rs. 1/24 lakh

(c) loss of Rs. 1/12 lakh

(d) loss of Rs.1/18 lakh

**80. If a man estimates his loss as 20% of the selling price, then his loss per cent is**

(a) 20%

(b) 25%

(c)40/3%

(d) Data inadequate

**81. If x = 1/3y and Y =1/2z ,then x : y : z, is equal to**

(a) 3: 2: 1

(b) 1: 2: 6

(c) 1: 3: 6

(d) 2: 4: 6

**82. Divide Rs. 1250 among A, B, C, so that A gets 2/9 of B’ss share and C gets 4 of A’s share. **

(a) Rs. 200, Rs. 800, Rs. 250

(b) Rs. 200, Rs. 900, Rs. 150

(c) Rs. 150, Rs. 800, Rs. 300

(d) Rs. 200, Rs. 900, Rs. 75

**83. The ratio of two numbers is 3 :8 and their difference is 115. The smaller of the two numbers is**

(a) 184

(b) 194

(c) 69

(d) 59

**84. Between two consecutive years my incomes are in the ratio of 2 : 3 and expenses in the ratio 5 : 9. If my income in the second year is Rs. 45000 and my expenses in the first year is Rs. 25000 my total savings for the two years is**

(a) Nil

(b) Rs. 15000

(c) Rs. 10000

(d) Rs. 5000

**85. Rs. 180 contained in a box consists of one rupee, 50 paise and 25 paise coins in the ratio 2 : 3 : 4. What is the number of 50 paise coins?**

(a) 60

(b) 120

(c) 150

(d) 180

**86. Of the three numbers whose average is 60, the first is one fourth of the sum of the others. The first number is**

(a) 30

(b) 36

(c) 42

(d) 45

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## RRB Group-D Exam Study Kit

## रेलवे भर्ती बोर्ड Group-D परीक्षा अध्ययन सामग्री

## RRB Group-D Exam Online Tests Series

**87. The average of 11 numbers is 10.8. If the average of the first six be 10.4 and that of the last six is 11.5, then the middle (6th) number is**

(a) 10.3

(b) 12.6

(c) 13.5

(d) 15.5

**88. The average age of 12 players of a team is 25 years. If the captain’s age is included, the average age increases by 1 year. The age of the captain is :**

(a) 25 yrs.

(b) 38 yrs.

(c) 36 yrs.

(d) 26 yrs.

**89. The average income of 40 persons is Rs. 4200 and that of another 35 persons is Rs. 4000. The average income of the whole group is:**

(a) Rs. 4100

(b) Rs. 4106 3

(c) Rs. 410623

(d) Rs. 4108 3

**90. The length of the diagonal of a square is ‘a’ cm. Which of the following represents the area of the square (in sq. cm.) ?**

(a) 2a

(b) a/√2

(c) a^{2}/2

(d) a^{2}/4

**91. If the volumes of two cubes are in the ratio 27: 1, the ratio of their edges is**

(a) 3 : 1

(b) 27 : 1

(c) 1 :3

(d) 1 : 27

**92.The sides of a rectangular plot are in the ratio 5:4 and its area is equal to 500 sq.m. The perimeter of the plot is**

(a) 80m.

(b) 100m.

(c) 90m.

(d) 95m.

**93. The radius of a wheel is 21 cm. How many revolution will it make in travelling 924 metres?**

(a) 7

(b) 11

(c) 200

(d) 700

**94. The edges of a cuboid are in the ratio 1 : 2 : 3 and its surface area is 88cm ^{2 }. The volume of the cuboid is:**

(a) 120 cm^{3}

(b) 64 cm^{3}

(c) 48 cm^{3}

(d) 24 cm^{3}

**95. The area of a sector of a circle of radius 5 cm, formed by an arc of length 3.5 cm is**

(a) 8.5 cm^{2}

(b) 8.75 cm^{2}

(c) 7.75 cm^{2}

(d) 7.50 cm^{2}

**97. A solid metallic cone of height 10 cm, radius of base 20 cm is melted to make spherical balls each of 4 cm. diameter. How many such balls can be made ?**

(a) 25

(b) 75

(c) 50

(d) 125

**98. The height of a conical tank is 60 cm and the diameter of its base is 64cm. The cost of painting it from outside at the rate of Rs. 35 per sq. m. is**

(a) Rs. 52.00 approx.

(b) Rs. 39.20 approx.

(c) Rs. 35.20 approx.

(d) Rs. 23.94 approx.

**99. A cylindrical tank of diameter 35 cm is full of water. If 11 litres of water is drawn off, the water level in the tank will drop by :**

**100. A and B can do a piece of work in 72 days. B and C can do it in 120 days, A and C can do it in 90 days. In how many days all the three together can do the work ?**

(a) 80 days

(b) 100 days

(c) 60 days

(d) 150 days