Question : Directions: By interchanging the given two signs which of the following equations will be correct?
× and –

Question : What is the value of $6-(6\div 2-3+7-2) \times[\{3-2 \div 2\} \times 5-6]?$

Question : Directions: By interchanging the given two signs which of the following equations will be not correct?
– and ×

Question : Directions: If + means ÷, – means +, × means –, and ÷ means ×, what will be the value of the following expression?
[{(38 × 23) – (4 ÷ 3)} + (6 – 3)] ÷ 2

Question : Simplify the following expression:
[$\sqrt{25}$ + 12 ÷ 3 – {20 + (16 of 8 ÷ 16) – (54 ÷ 18 of $\frac{1}{2}$}]