Question

To open gate C, find the value of the expression: $4+2+6÷2\times 3+1\times 5$

• A. 20
• B. 25
• C. 95

Answer 1

The correct option is A 20

Let's recall the PEMDAS rule.

$P\to \text{Parenthesis}E\to \text{Exponents}M\to \text{Multiplication}D\to \text{Division}A\to \text{Addition}S\to \text{Subtraction}$

As the expression $4+2+6÷2\times 3+1\times 5$ contains addition, division and multiplication operation operations, we perform the division and multiplication operation first, moving from left to right.

$4+2+6÷2\times 3+1\times 5$
$=4+2+3\times 3+1\times 5$

Similarly, we perform the subsequent multiplications, one by one, starting from the left.

$\to 4+2+3\times 3+1\times 5$
$=4+2+9+1\times 5$
$=4+2+9+5$

Finally, we perform the addition operations, starting from left.

$\to 4+2+9+5$
$=6+9+5$
$=15+5$
$=20$

$\therefore$ The value of the expression is $20.$