Question

9 8 15
6 4 2
6 10 ?
find the missing number??​

Answer 1

The missing number is 14

9    8    15

6    4     2

6    10   14

Reason :

• The first columed elements are 9 , 6 , 6. The pattern goes as

        (first element - last element)*2 = middle element.

        (9 - 6)*2 = 3*2 = 6

• The next columed elements are 8 , 4 , 10. The pattern goes as

        (last element - first element)*2 = middle element.

        (10 - 8)*2 = 2*2 = 4

• If we go by alternative pattern, the next column's last element will be :

       (first element - last element)*2 = middle element.

       (15-?)*2 = 2

        15 - ? = 1

        ? = 15 -1

        ? = 14

       So, the element in the place of ? is 14.

• These kind of questions are known as puzzles. Puzzles can have more than one answer, based on the perceptions on make, unless options are given.

• The other assumption can be the absolute difference between first and last elements in the column * 2. This leads to 2 possibilities 14 and 16.

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