Many business offices are located in buildings having 2-8 floors. If a building has more than 3 floors, it has a lift. If the above statements are true, which of the following must be true?

• 1. A. 2nd floors do not have lifts    

  
  

• 1. B. 7th floors have lifts    

• C. Only floors above the 3rd floors have lifts

• D. All floors may be reached by lifts

Answer explanation

We are given that any building with more than 3 floors has a lift (elevator) to access the floors. Hence, naturally, seventh floor in a building will have a lift.  However, we are not given whether all the floors re accessible by lifts or the lift service is only available from the third floor. Hence, we cannot say anything conclusively about options A, B and D. Hence, only B is definitely true...

There are two examinations rooms A and B. If 10 students are sent from A to B, then the number of students in each room is the same. If 20 candidates are sent from B to A, then the number of students in A is double the number of students in B. The number of students in room A is:

• A. 20

• B. 80

• C. 100

• D. 200

Answer explanation

Let the number of students in rooms A and B be x and y respectively.

Then, x - 10 = y + 10 x - y = 20 .... (i)

and x + 20 = 2(y - 20) x - 2y = -60 .... (ii)

Solving (i) and (ii) we get: x = 100 , y = 80. The required answer A = 100.

The salaries A, B, C are in the ratio 2 : 3 : 5. If the increments of 15%, 10% and 20% are allowed respectively in their salaries, then what will be new ratio of their salaries?

• A. 3 : 3 : 10

• B. 10 : 11 : 20

• C. 23 : 33 : 60

• D. Cannot be determined

Answer explanation

Find wrong number in series:
34, 7, 37, 14, 36, 28, 43, 56

• A. 14

• B. 36

• C. 28

• D. 56

Answer explanation

mixture of series (alternate numbers)
34+3=37,
37+3 =40...
7*2= 14
14*2= 28
28*2 =56

A fruit seller had some apples. He sells 40% apples and still has 420 apples. Originally, he had:

• A. 588 apples

• B. 600 apples

• C. 672 apples

• D. 700 apples

Answer explanation

Spotting Errors

• A. A lot of travel delay is caused

• B. due to the inefficiency and lack of good management

• C. on behalf of the railways.

• D. No error.

Answer explanation

on the part of the railways

EXODUS

• A. Influx

• B. Home-coming

• C. Return

• D. Restoration

Look at this series: 2, 1, (1/2), (1/4), ... What number should come next?

• A. (1/3)

• B. (1/8)

• C. (2/8)

• D. (1/16)

Answer explanation

This is a simple division series; each number is one-half of the previous number.

In other terms to say, the number is divided by 2 successively to get the next result.

4/2 = 2 2/2 = 1 1/2 = 1/2 (1/2)/2 = 1/4 (1/4)/2 = 1/8

Look at this series: 14, 28, 20, 40, 32, 64, ... What number should come next?

• A. 52

• B. 56

• C. 96

• D. 128

Answer explanation

This is an alternating multiplication and subtracting series: First, multiply by 2 and then subtract 8.

In a certain code, "A # B" means "A is 2 more than B," "A @ B" means "A is half of B," and "A $ B" means "A is the square of B." If 5 # 3 and 4 $ 2 are true, what is the result of 16 @ 8?

• A.
  TRUE

• B. FALSE

• C. insufficient data

• D. none of these

Answer explanation

"A @ B" means "A is half of B
Therefore, 16 @ 8 isn't true