The letters from A to Z are numbered from 1 to 26 respectively. If GHI = 1578 and DEF = 912, then what is ABC equal to?

The correct option is 246.

Step-by-step explanation:

Step 1: Understand the alphabetical positional values.
Each letter of the English alphabet is assigned a number based on its position (from 1 to 26):

$\text{A}=1$

$\text{B}=2$

$\text{C}=3$

$\text{D}=4$

$\text{E}=5$

$\text{F}=6$

$\text{G}=7$

$\text{H}=8$

$\text{I}=9$

Step 2: Analyze the pattern in the given examples.

For GHI:
Concatenating the positional digits of G (7), H (8), and I (9) gives the number 789.
Multiplying this number by 2 gives:

$789\times 2=1578$

This matches the given condition GHI = 1578.

For DEF:
Concatenating the positional digits of D (4), E (5), and F (6) gives the number 456.
Multiplying this number by 2 gives:

$456\times 2=912$

This matches the given condition DEF = 912.

Step 3: Apply the pattern to calculate ABC.

Concatenating the positional digits of A (1), B (2), and C (3) gives the number 123.
Multiplying this number by 2 gives:

$123\times 2=246$

Therefore, ABC is equal to 246.