Question

12345 what is the answer if you multiply 1x2x3x4x5 and do the same with subtraction, addition and devision, in that order. Then add the totals together.

Answer 1

Well, we just need to perform the operations:

• Multiplication: $1\cdot 2 \cdot 3 \cdot 4 \cdot 5 = 120$
• Subtraction: $1-2-3-4-5 = -13$
• Addition: $1+2+3+4+5 = 15$
• Division: $1 \div 2 \div 3 \div 4 \div 5 = \frac{1}{120}$

So, if you add all the numbers together you get

$120-13+15+\dfrac{1}{120} = 122 + \dfrac{1}{120}$

Or, if you prefer,

$\dfrac{1681}{120}$