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PSYCHO15rus [73]
3 years ago
13

What’s the missing number?

Mathematics
2 answers:
dimaraw [331]3 years ago
8 0

Step-by-step explanation:

Notice that:

1st column = (5 - 1)² = 16

2nd column = (11 - 4)² = 49

Therefore 3rd column = (18 - *)² = 121, * = 7.

creativ13 [48]3 years ago
5 0

Answer:

7 is the missing number

Step-by-step explanation:

Let the missing number be x.

Lets study the pattern of the numbers. In each column , we find that the bottom number is the square of the difference of first 2 numbers.

In 1st column ,

Difference of first 2 numbers = 5 - 1 = 4

The bottom number = 16 = 4²

In 2nd column ,

Difference of first 2 numbers = 11 - 4 = 7

The bottom number = 49 = 7²

Similarly ,

Difference of first 2 numbers = 18 - x

The bottom number = 121

=  >  {(18 - x)}^{2}  = 121

=  >  {(18 - x)}^{2}  =  {11}^{2}

=  > 18 - x = 11

=  > x = 18 - 11 = 7

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