RRB Group D Mock Test - 27 - Railways MCQ

Let SP of 1 item = 10/-

CP of 10 items = SP of 8 items = 80-/

CP of 1 item = 80/10 = 8/-

profit = 10-8 = 2/-

%profit = 2/8 x 100times 100 = 2582​×100=25%

So the answer is option B.

Sum of their scores = 43.66*3 = 131

Given that Sum of scores of two players = 80

Then score of 3rd player = 131 - 80 = 51

So the answer is option D.

2hrs 45mins = 2\frac{3}{4}243​hrs = \frac{11}{4}411​hrs

Distance = speed*time = (40)*(11/4) = 110km

So the answer is option A.

From the diagram, tanθ = 5/12, cotθ = 12/5

cotθ+tanθ = 12/5 + 5/12 = 169/60

So the answer is option C.

To be divisible by 11, (sum of digits in odd places)-(sum of digits in even places) must be divisible by 11.

Lets check option A,

734867 => sum of digits in odd places = 7+4+6 = 17 & that of even places = 3+8+7 = 18, difference = 18-17 = 1 (not divisible by 11)

Lets check option B,

724867 => sum of digits in odd places = 7+4+6 = 17 & that of even places = 2+8+7 = 17, difference = 17-17 = 0 (divisible by 11)

So the answer is option B.

Assume total work = LCM of 4 & 6 = 12 units

Efficiency of M&N; = 12/4 = 3

Efficiency of N = 12/6 = 2

Efficiency of M = 3 - 2 = 1

Hence only M can complete 50% of work i,e; 12/2=6 units of work in 6/1 = 6 days

So the answer is option D.

squaring on both sides

Again squaring on both sides

So the answer is option C.

Let other sides are a, a

So the answer is option B.

Let cost price of car = 100/-

then CP of bike = 20% of 100 = 20/-

Cost price of car and bike = 100+20 = 120/-

SP of car = 1.2(100) = 120/-

SP of bike = (1-0.2)(20) = 16/-

SP of car and bike = 120+16 = 136/-

Profit = 136-120 = 16/-

Profit % =  \times 100 = 13.3312016​×100=13.33%

So the answer is option D.

a+ib = 0

a+ib = 0+0i

on comparing those two, a = 0 and b = 0

So the answer is option D.

From the diagram, 

So the answer is option A.

Let x be the width of the path

Area of square filed = 36 sq.m

Then side of the square = 6m

Total area = 36+28 = 64sq.m

(6+2x)(6+2x) = 64

(6+2x)(6+2x) = 8*8

6+2x = 8

x = 1

So the answer is option C.

For sphere,

Total surface area = curved surface area

So m = n is the right answer,

So the answer is option B.

relative speed = 35+55 = 90 kmph = 90*(5/18) = 25 m/s

Time taken to cross each other =

So the answer is option C.

Surface area of 4 walls of a enclosed room = [2l+2b]*h = [2(10)+2(7)]*(5) = [34]*5 = 170 sq.m

Cost of painting of 1 sq.m = 2/-

Cost of painting of 170 sq.m = 170*2 = 340/-

So the answer is option D.

The relation which is displayed by the first set of letters is that the numerical position of the second letter is square of the numerical position of the first letter.
So we have D = 4 and P = 16
Using the same logic, we know that E = 5. Hence, the required word must be square of 25 which gives Y.
Thus, option C is the correct answer.

Lion, Cat and Tiger belong to the same feline family. Hence, Horse is the odd one out. Thus, option D is the correct answer.

‘b’ comes before ‘c’ and ‘a’ comes before ‘s’. Hence, ‘abandon’ will be the first word in the dictionary. Now ‘o’ comes before ‘t’. Hence, ‘absolute’ will come before ‘abstract’. ‘a’ comes before ‘c’ and so academic will come before ‘accident’. Thus, the correct order will be 1, 4, 2, 3, 5.

The pattern which is being followed is that the square of the sum of the digits of the number is being added to the number to get the next number. For example, 11 + 2^2 = 1511+22=15
15 + 6^2 = 5115+62=51
51 + 6^2 = 8751+62=87
87 + 15^2 = 31287+152=312
Hence, using the same logic the next term will be 
312 + (3+1+2)^2 = 348312+(3+1+2)2=348
Hence, option B is the correct answer.

The words which can be formed using the letters a, e, m, n are
name, mean, amen and mane. Hence, there are 4 words which can be formed. Thus, option B is the correct answer.

The pattern which is being followed in the given words is that the letters at the odd positions are being replaced by the letters which succeed them in English alphabets while the letters at even positions are being replaced by the letters which precede them in the english alphabets. For example
B and W are first letters (odd positions), hence they have been replaced with C and X. Similarly R is at even position and hence, it has been replaced with Q. 
Using the same logic, the code word for GIGANTIC will be HHHZOSJB

6 P 2 R 9 S 3 Q 4 = 6 * 2 - (9 / 3) + 4 = 12 - 3 + 4 = 13
Hence, option A is the right answer.

(6 * 7) - 3 = 39
(9 * 3) - 5 = 22
(13 * 4) - ? = 37
? = 52 - 37 = 15
Hence, option B is the right choice.

Some apples are mangoes and some mangoes are guavas. All guavas are tomatoes. Hence, some mangoes must be tomatoes. Hence, some mangoes can be red as well. Thus, II can cannot be true.
I is not necessarily true as apples need not necessarily be red. Hence neither I nor II follows.

12^2 + 1 + 2 = 147
So, 17^2 + 1 + 7 = 297
Hence, option B is the right answer.