12 self study question with answer--26

Question 1

If sin x+ sin y= 2, then the find value of cos x+ cos y

  1/2

  -1

  1

  0

It's '0 '
We know that maximum value of sin θ is 1 when θ is 90.
Now, sin x+ sin y= 2 is possible only when x = y =90
Hence, cos x+ cos y= cos 90+ cos 90= 0+ 0= 0

Question 2

On selling 560 balls, a shopkeeper makes a profit equal to selling price of 80 balls. Find his profit percentage.

  16.67

  22.22

  33.33

  25

It's '16.67 '
Let the SP of one ball be Re. 1. On selling 560 balls, total profit = SP of 80 balls =Rs 80.
Now, Rs. 80 is profit on total SP of Rs. 560. Therefore, CP = 560-80= Rs. 480.
Profit %= 100= 16.67%

Question 3

Aman sold his cell for Rs. 49470 at a loss of 15%. Find the price at which he should have sold his cell to gain 14%.

  62358

  35478

  66348

  60256

It's '66348 '
Let CP of the cell be X. After a loss of 15%, SP = 0.85X = 49470. Therefore, X = Rs. 58200.
Now, to gain 14%, SP = 582001.14 =Rs. 66348.

Question 4

In a certain code language, SUN is coded as 27. How will MOON be coded in the same language?

  51

  54

  48

  63

It's '51 '
Taking Z=1, Y=2, X=3 and so on till A= 26, we see that S=8, U=6, N=13.
So, SUN= 8+6+13= 27. Using the same logic, MOON= 14+12+12+13= 51.

Question 5

If white means yellow, yellow means red, red means orange and orange means green then what colour is blood?

  green

  yellow

  orange

  white

It's 'yellow '
Blood is red in colour but in the question yellow means red. Hence yellow is the answer.

Question 6

If 84+70=14; 48+32=16, then 18+4=?

  4

  2

  6

  3

It's '2 '
14 is the HCF of 84 and 70. 16 is the HCF of 48 and 32. Similarly 2 is the HCF of 18 and 4.

Question 7

Which one of the following is correctly spelt?

  Contemperary

  Contemporery

  Contemporary

  Contamporary
Difficulty – Moderate

It's 'Contemporary '

Question 8

Apple-pie order means?

  sweet manner

  revealing the secret

  very delicious in taste

  extreme neatness

It's 'extreme neatness '

Question 9

Very old age when person is weak and behaves like a fool is called?

  senileness

  implicibility

  dotage

  oldage retardness

It's 'dotage '

Question 10

The strait which connects the Pacific Ocean and Atlantic Ocean ?

  Magellan

  Mallaca

  Hormuz

   Gibraltar

It's 'Magellan '

Question 11

Which process converts liquid Vegetable Oil into solid Vanaspati Ghee ?

  volvanisation

  galvanization

  posturization

  hydrogenation

It's 'hydrogenation '

Question 12

The first Afro-Asian Games in 2003 were hosted by?

  Bangalore

  Hyderabad

  Kolkata

  Delhi

It's 'Hyderabad '

12 self study question with answer--25

Question 1

There are some coins of Re. 1, Rs. 2 and Rs. 5 in ratio 2:3:5. If the bag has Rs.66 in total, then find the number of Rs.5 coins??

  20

  15

  10

  25

It's '10 '
Let the number of coins be 2x, 3x and 5x. Now, their value is 2x+6x+25x=66 => x=2. Therefore, number of Rs.5 coins = 10.

Question 2

On selling 50 products, a merchant made a loss equal to selling price of 25 articles. Find his loss percentage.

  40

  25

  66.67

  33.33

It's '33.33 '
Let SP of one product be Re. 1. Now, total SP= Rs. 50 and total loss= Rs. 25
Thus total CP= 50+25= Rs. 75
Loss %= (25/75)100=33.3%

Question 3

Each of the five angles of a polygon is equal to 192 º andthe other are 160 º each. The number of sides of the polygon is

  21

  26

  28

  27

It's '26 '
Let the number of sides be ‘x’. Then according to question, 5192+(x-5)160=(x-2)180. So, ‘x’=26.

Question 4

Direction : Study the following figure and answer the questions given below.

How many backward educated people are unemployed?

  9

  6

  11

  5

It's '11'
11 people are in all the three fields

Question 5

How many backward people are employed ?

  5

  6

  8

  3

It's '8'
5 + 3 = 8

Question 6

Two positions of a cube are given. Based on them find out which number is found opposite number 4 in a given cube?

  1

  2

  3

  4

It's '3'

Question 7

Directions: Choose the correct preposition from the alternatives.

Rashmi can't decide _____ to move in with her boyfriend.

  whether

  if

  that

  about

It's 'whether '

Question 8

There will be less unemployment this year, or so the newspaper _____ .

  writes

  tells

  thinks

  says

It's 'says '

Question 9

The effects caused by World War II lasted well ____ the fifties

  after

  beyond

  over

  for

It's 'beyond '

Question 10

Founder of VanMahotsav is?

  Parveen Singh

  VN Nyer

  KM Munshi
D.

  Subramanian

It's 'KM Munshi
D.'

Question 11

Abbreviation SIM stands for?

  Subscriber Identity Method

  Subscriber Identity Module

  Subscription Identity Model

  Subscription Identity Method

It's 'Subscriber Identity Module '

Question 12

No. of bones in human skull is?

  20

  22

  24

  26

It's '22 '