1
Q:

There are five books of different thickness. A is thicker than C and B is thicker than D. E is not as thick as B, but is thicker than C. D is not as thick as C. Which is the thinnest book?

A) E B) D
C) B D) C

Answer:   B) D

Explanation:

A > C  -----(i),   B > D  -----(ii),  E < B  --------(iii),  E > C  ---------(iv),  C > D  ---------(v)

from (i) and (v),   we get    A > C > D   ---------(I)

from (iii) and (iv), we get    B > E > C    --------(II)

From (I) and (II) , it is clear that 'D' is the thinnest.

Q:

If it is possible to form a number with the second, the fifth and the eighth digits of the number 31549786, which is the perfect square of a two - digit even number, which of the following will be the second digit of that even number ?

A) 1 B) 4
C) 6 D) None of these
 
Answer & Explanation Answer: B) 4

Explanation:

The 2nd, 5th and 8th digits of the number 31549786 are 1, 9 and 6 respectively.

The perfect square of a two - digit even number, formed using the digits 1, 9 and 6 is 196. And, 

So, the required even number is 14. Clearly, its second digit is 4.

Hence, the answer is (b).

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5 297
Q:

How many such digits are there in the number 7346285 which are as far away from the beginning of the number, as they will be when arranged in ascending order within the number?

A) None B) one
C) Two D) Three
 
Answer & Explanation Answer: C) Two

Explanation:

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16 1473
Q:

If the digits in the number 25673948 are arranged in ascending order from left to right, what will be the sum of the digits which are fourth from the right and third from the left in the new arrangement?

A) 10 B) 9
C) 8 D) 6
 
Answer & Explanation Answer: A) 10

Explanation:

Given Number :      2 5 6 7 3 9 4 8

Ascending order :  2 3 4 5 6 7 8 9

Specified letters are 6 and 4 respectively.

 required sum = (4 + 6 =) 10

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8 938
Q:

382  473  568  728  847  629

If 382 is written as 238, 473 as 347 and so on, then which of the following two numbers will have least difference between them?

A) 473 & 382 B) 629 & 728
C) 629 & 847 D) 728 & 847
 
Answer & Explanation Answer: D) 728 & 847

Explanation:

The given numbers are :

382  473  568  728  847  629

When changes are made as given in the question, numbers become as follows :

238  347  856  872  784  962

Again now, find out the difference between the numbers given in options as given below:

(1) 473 - 382  => 347 - 238 = 109

(2) 629 - 728  => 962 - 872 = 90

(3) 629 - 847  => 962 - 784 = 178

(4) 728 - 847  => 872 - 784 = 88

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7 645
Q:

In the following set of numbers, if 1 is added to the last digit and then the orderr of digits is reversed, which number will be fourth if arranged in ascending order?

567    284    696    865    738

A) 567 B) 284
C) 865 D) 738
 
Answer & Explanation Answer: A) 567

Explanation:

Here the given numbers are 

567  284  696  865  738

When 1 is added to the last digit of each of the above numbers, it becomes as follows :

568  285  697  866  739

After reversing the order of digits , we get

865  582  796  668  937

Now , when the numbers are arranged in ascending order their order becomes as follows:

582  668  796  865  937

Hence , the fourth number is 865 (a number formed by 567). Therefore option(1) is correct answer.

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11 541