Question

If x stands for $÷$ stands for + , + stands for $÷$ and - stands for x which one of the following equations is correct ?

• A. $15-5÷5\times 20+10=6$
• B. $8÷10-3+5\times 6=8$
• C. $6\times 2+3÷12-3=15$
• D. $3÷7-5\times 10+3=10$

Answer 1

The correct option is B $8÷10-3+5\times 6=8$

Using the proper signs we get
Expression in (1) $=15-5÷5\times 20+10$
Expression in (2) $=15\times 5+5-2=75+5-2=78$
$=8+10\times 3÷5-6=8+10\times \frac{3}{5}-6=8+6-6=8$
Expression in (3) $=6-2÷3+12\times 3=6-\frac{2}{3}+36=42-\frac{2}{3}=\frac{124}{3}$
Expression in (4)
$=3+7\times 5-10÷3=3+7\times 5-\frac{10}{3}=\frac{104}{3}$
$\therefore$ Statement (2) is true