Question

Find Ma)21b)32c)40d)63Step by step please​

Answer 1

M is a. 21..........

Answer 2

Answer:

  a)  21

Step-by-step explanation:

If the columns are labeled a, b, c, d left to right, it appears that we have ...

  $\sqrt{a}\times(b-c)=d\\\\\sqrt{49}\times(10-7)=21$

The value of M is 21.

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Questions like this require that you try different combinations of operations on the numbers shown to see if you can find a relationship. Here, the left column is a perfect square, so that is a clue. The difference of the numbers in the middle columns is a factor of the number in the right column -- another clue. It takes a certain amount of creative thought and familiarity with arithmetic facts. There is no "step-by-step" for a problem like this.