Question

42 21 22
78 ? 84
162 18 99
what is the number in question mark
​

Answer 1

The question mark ? will be replaced by 143/14

Step-by-step explanation:

This is a mathematical reasoning question.

The first sequence is (42 21 22)

Here 42 ÷ 21 = 2 * 11 = 22

and the third sequence is (162 18 99)

Here 162 ÷ 18 = 9 * 11 = 99

We see that the first number of any sequence is divided by the second number in that sequence, and that value is multiplied by 11. Thus the third number in that sequence is obtained.

The second sequence is (78 ? 84)

From the reasoning we can write

78 ÷ ? = x * 11 = 84

Then 11x = 84, i.e., x = 84/11

To find the value of ? here, we divide 78 by x = 84/11

Therefore ? = 78 ÷ (84/11)

= 143/14

Confirmation:

78 ÷ (143/14) = 84/11 * 11 = 84

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Answer 2

The missing number is $\frac{143}{14}$.

Step-by-step explanation:

Consider the provided information.

Consider the first row:

Divide the first number with second number and multiply it with 11 gives you 22.

42 ÷ 21 = 2 × 11 = 22

Consider the third row:

162 ÷ 18 = 9 × 11 = 99

Let the missing number is x.

78 ÷ x = $\frac{84}{11}\times 11$ = 84

Thus,

$\frac{78}{x}=\frac{84}{11}$

$x=\frac{78\times 11}{84}$

$x=\frac{143}{14}$

Hence, the missing number is $\frac{143}{14}$.

#Learn more

https://brainly.in/question/12861274

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