Question

3,1,8 2,6,2 4,7,5 65 ? 54 ​

Answer 1

Answer:

X = 76

Step-by-step explanation:

Let us first arrange the numbers in rows and colums

3      1    8

2     6    2

4     7     5

65   x   54

We are required to find X, unknown letter in 4th row, 2nd column

If we see the puzzle row wise, we notice that each row numbers are multiple of first entry of that row. This can be explained as

1st row         :         8+1=9    multiple of 3.

2nd row :         6+2=8   multiple of 2.

3rd row      :         7+5=12  multiple of 4.

4th row   :         54+x=multiple of 65

Let us chose 130 as a multiple of 65

x=130-54=76.

Hence X is 76

Answer 2

Answer:

3       1      8

2      6      2

4      7       5

65   206   54 ​

Step-by-step explanation:

Let the number in a row be x, y and z.

The formula used in this number series be:

y + z = p, where p is a multiple of x.

Row 1: 8 + 1 = 9 (3 × 3), which is multiple of 3.

Row 2: 6 + 2 = 8 (2 × 4), which is multiple of 2.

Row 3: 7 + 5 = 12 (4 × 3), which is multiple of 4

Row 4: x + 54 = p (65 × 4), which is multiple of 65

64 × 4 = 260 ⇒ p = 260 - 54 = 206