Question

what is the missing number in a circle
5;7 = 37
8;4=20
10;4= 34
6;4=?

Answer 1

Given data :

Sets are

5 7 (37)   ;   8 4 (20)   ;   10 6 (34)

To find :  

The missing number in 6 4 (?)  

Solution:

Logic applied behind :

Let A, B, C are the three numbers in the given set respectively.

Then, apply C = ( A² - B²) / | A - B |

5 7 (37), Here C = 37 :

A = 5, B = 7

Then, ( 5² + 7² ) / | 5 - 7 |

       = (25 + 49) / |-2|

       = 74/2

       = 37         [=C]

8 4 (20), Here C = 20 :

A = 8, B = 4

Then, ( 8² + 4² ) / | 8 - 4 |

       = (64 + 16) / |4|

       = 80/4

       = 20         [=C]

10 6 (34), Here C = 34 :

A = 10, B = 6

Then, ( 10² + 6² ) / | 10 - 6 |

       = (100 + 36) / |4|

       = 136/4

       = 34         [=C]

6 4 (?), Here C = ? :

A = 6, B = 4

So, C = ( 6² + 4² ) / | 6 - 4 |

        = (36 + 16) / |2|

        = 52/2

        = 26         [=C]

So, 26 is the answer.

Learn more :

1. Which of the following options will best complete the relationship given below? 13(4624)33 15(5735)42 11(????)37​

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2. 'HARD' is coded as '90209150' and 'MORE' is coded as '41619160'. Now, answer the following questions.​..

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3.  If the words given have such values YES=43, NO=25, OR=29, what is the value of MAYBE

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Answer 2

Answer:

$\begin{gathered}\boxed{\begin{array}{cccc}\bf x & \bf y \\ \frac{\qquad \qquad \qquad \qquad}{} & \frac{\qquad \qquad \qquad \qquad}{} \\ \sf 0 & \sf - 2.5 \\ \\ \sf 5 & \sf 0 \end{array}} \\ \end{gathered}$