If 10% of 20 + 20% of 30 + 30% of 40 + 40% of 50 = x% of 800, find the value of 'X'.

Evaluate:
16 + 8 ÷ 4 − 3 × 4

Evaluate:
(−9) − (−60) ÷ (−12) + (−4) × 8

The value of 66 - 2 × [ 10 + 2 × { 18 - 2 ( 7 - 4 ) × 3} ÷ 50] is:

Evaluate: (-9) - (-60) ÷ (-12) + (-4) × 7

Evaluate: 32 ÷ 8 × 3 - 2 × 3

What is value of $$21\times 6\div 18-3 \div2+3-3\div(9\ \text{of}\ 3)\times 9+3\div(18\ \text{of}\ 3)\times 6?$$​​

The value of 79 - 10 × [ 2 + 3 × { 12 - 6 ( 6 - 5 ) × 2} ÷ 20] is:

Evaluate: 2 - [3 - {6 - (6 - 4 + 6)}]

Evaluate: 32 ÷ 8 × 4 - 2 × 3

Evaluate: (-9) − [(-60) ÷ (-12)] + (-4 × 6)