Question

A 4 - digit number is written in the giver
boxes
7
8
If the sum of any three consecutive digits is
20, find the value of A.
(A) 1
(B) 4
(C) 7
(D) 8​

Answer 1

Complete question:

A 4 - digit number is written in the boxes below. If the sum of any three consecutive digits is 20, find the value of A.

|A|_|7|8|

(A) 1 (B) 4 (C) 7 (D) 8​

The answer to the given question is option (D) 8​

Given:

A 4 - digit number is written in the boxes below

|A|_|7|8|

To Find:

The value of A =?

Solution:

|A|_|7|8|

If the sum of any three consecutive digits is 20, we have to find the value of A.

Let us assume the second digit from the left to be x.

Since the sum of any three consecutive digits is 20.

x + 7 + 8 = 20

x + 15 = 20

x = 5

Now the number is

|A|5|7|8|

A + 5 + 7 = 20 (according to the condition given in the question)

A + 12 = 20

A = 8

If the sum of any three consecutive digits is 20, then the value of A will be 8.

The answer to the given question is option (D) 8​

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