If ‘A’ stands for ‘÷’, ‘B’ stands for ‘×’, ‘C’ stands for ‘+’ and ‘D’ stands for ‘−’, what will come in place of the question mark (?) in the following equation?
46 A 2 C 21 D 8 B 3 = ?

The correct answer is 20.

To solve the given mathematical puzzle, we need to substitute the letters with their corresponding mathematical operators as defined in the question:

• 'A' stands for division (÷)
• 'B' stands for multiplication (×)
• 'C' stands for addition (+)
• 'D' stands for subtraction (−)

Given equation:

$46 A 2 C 21 D 8 B 3=?$

Replacing the letters with the actual symbols, we get:

$46÷2+21-8\times 3$

Now, applying the standard order of operations (BODMAS / PEMDAS - Division and Multiplication from left to right, followed by Addition and Subtraction):

Step 1: Perform Division and Multiplication first:

$46÷2=23$

$8\times 3=24$

Substituting these values back into the expression gives:

$23+21-24$

Step 2: Perform Addition and Subtraction from left to right:

$23+21=44$

$44-24=20$

Thus, the value that comes in place of the question mark (?) is 20.