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In the following number-pairs, the second number is obtained by applying certain mathematical operations to the first number. Select the set in which
Question

In the following number-pairs, the second number is obtained by applying certain mathematical operations to the first number. Select the set in which the numbers are related in the same way as are the numbers of the following sets. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding / subtracting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
(37.4, 34.6)
(45, 42.2)​​

A.

32.9 , 29.1

B.

69 , 66.2

C.

21.5 , 17.7

D.

58 , 56.2

Correct option is B

Given :

37.4, 34.6
45, 42.2
Logic: First number -  Second number = 2.8
  • ​37.4, 34.6
37.4 - 34.6 = 2.8 ( True )
  • ​45, 42.2
             45 - 42.2 = 2.8 ( True )
Analyze each option 
Option (a) 32.9 , 29.1
32.9 - 29.1 = 3.8
3.82.83.8\neq2.8 
It does not follow 
Option (b) 69 , 66.2
69 - 66.2 = 2.8
2.8  = 2.8 Follows
It follow the logic
Option (c) 21.5 , 17.7
21.5 - 17.7 = 3.8
3.82.83.8\neq2.8​​
It does not follow
Option (d) 58 , 56.2
58 - 56.2 = 1.8
1.82.81.8\neq2.8​​
It does not follow
Thus , the correct answer is option ( b) 69 , 66.2

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