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sandeep kumar

· started a discussion

· 1 Months ago

sfvs (Question: 170193.0 )

23 is prime ?

Question:

DIRECTIONS:  In each of the following questions, two rows of numbers are given. The resultant number of each row is to be worked out separately based on the following rules and the question below the row of numbers is to be answered. The operations of numbers progress from left to right,


Rules:


(i) If an odd number is followed by a composite odd number, they are to be multiplied,

(ii) If an even number is followed by an odd number, they are to be added.

(iii) If an even number is followed by a number, which is a perfect square, the even number is to be subtracted from the perfect square.

(iv) If an odd number is followed by a prime number, the first number is to be divided by the second number.

(v) If an odd number is followed by an even number, the second one is to be subtracted from the first one.


14       196      23

10         x       152


If x is the resultant of the first row, what is the resultant of the second row?

Options:
A) 367 
B) 91 
C) 63
D) 105 
E) None of these
Solution:

Ans: (c) 

In the first row

14        196      23

Here 196 is a perfect square and 14 is even. 

∴ According to rule (iii)

it will be (196-14) 182, which is an even number.

23 is an odd number.

According to rule (ii)

182 + 23 = 205 = x, is an odd number.

In the second row

10      205      152

10 is an even number.

∴ According to rule (ii), (10 + 205) = 215 which is odd.

152 is even.

Hence, the resultant of the second row is (215-152) = 63. 

Knowledge Expert

· commented

· 1 Months ago

Dear student
Here we have applied rule (ii) If an even number is followed by an odd number, they are to be added.
We are not given any condition related to even & prime number at the same time.So here we have consider 23 as odd number.

Regards
Team TR

BHAWNA

· commented

· 1 Months ago

yes
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