Question

6×4=13
7×5=20
5×8=21
5×7=?

Answer 1

Hey mate here is ur answer

6*4 = 13 (According to the question )
but in real it is 24
So it has a difference of 11

7*5 = 20 (A.T.Q.)
But in real it is 35
it has a difference of 15 which is 4 more than 11

5*8 = 21 (A.T.Q )
But in real it is 40
it has a difference of 19 which is 4 more than 15 (15 is obtained from previous step of 7*5 = 20 )

Now , 5*7 = 35 (in real )
But according to question it is 12 because we subtract 23 from 35 (Because 19 + 4 = 23 )
So we subtract 23 from 35

Thus , ur answer is 12

Hope it helps
Mark it brainliest

Answer 2

According To The Pattern, 5×7 = 23.

GIVEN

6×4=13

7×5=20

5×8=21

TO FIND

Value of (5 × 7) according to the given pattern

SOLUTION

We can simply solve the above problem as follows-

We are given

(a) 6 × 4 = 13

But in actual, 6×4 = 24

The difference in the product = 24-13 = 11

In the next term =

(b) 7×5 = 20

But in actual, 7×5 = 35.

The difference in the product = 35-20 = 15

We can also write 15 as 11+4

in the next term,

(c) 5 × 8 = 21.

But in actual, 5×8 = 40

The difference = 40-21 = 19

we can also write 19 as 15+4

Observing (a), (b) and (c)

the pattern is -

That the new product in (a) Was 11 less than the original product and in (b) and (c). The new product is such that difference between the new and original product is 4 more than the difference between the Previous new and original product.

Therefore,

The new product of 5 × 7 should be such that difference between the original and new product should be equal to 19 + 4

Let the new product be , x

We know that

5× 7 = 35

So,

35 - x = 23

x = 35- 23

x = 12

Hence, According to the pattern,

5×7 = 23.

#Spj2

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