Question

See the number chart shown below: If we choose any number from the first three rows of this chart and call it m, the number just below it will be

a)m + 1
b) 7 + m
c) m x 7
d) 8m

Answer 1

Answer:

m× 7

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Answer 2

Answer:

If the number is m, then the number just below it is option b (7+m).

Step-by-step explanation:

From the chart let us use the trial and error method.

Let us consider the chart as an array where the first row first element is represented as (1,1), the second row first element is represented as (2,1), the third row fifth element is represented as (3,5) and so on,

Consider the first row, first element(1,1) and second row, first element(2,1).

The difference between (1,1) and (2,1) is given as 1-8, ie, -7

Similarly the difference between (1,2) and (2,2) is given as 2-9, ie, -7.

In other words, the number just below it is 7 times greater than the actual number. If the actual number is m, then the number below it is m+7.

Now, consider the second and third row.

The difference between (2,1) and (3,1) is given as 8-15,ie, -7.

Similarly, the difference between all the numbers in second row and the number below it( third row) is -7.

If m is the number from the second row, then the number just below it is represented as m+7.

The same procedure is applied for the next row and the condition of m+7 to be the number just below it is proved.

Thus, if m is the number , then m+7 is the number just below it. The correct answer is option c.

To know more about trial and error and examples, refer:

https://en.birmiss.com/trial-and-error-method-advantages-and-disadvantages/

https://www.hitbullseye.com/Reasoning/Trial-Error-Method.php

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