Who is the Ex-officio chairman of the Council of

Find the simplified value of the given expression:

1.8² + 2.4² + 1.5² - 1.8 x 2.4 - 2.4 x 1.5 - 1.8 x 1.5

What value should come in place of (?).

41.8 × 12.5 × 15.2 × ? = 1985.50

436 × 794 – 68210 =? + 85730

6% of 520 + 5% of 620 = ?

What value should come in place of (?) question mark in the given expression.

(5/8 of 256) + (2/5 of 125) − 14 = ?

√3598 × √(230 ) ÷ √102= ?

What will come in place of (?) in the following questions?

√144 × √121 + 25% of 600 = ? + 256

(√2704 x 55)/(245 + 120) =?

{(52² – 48² ) ÷ (27 + 73)} × 35 = ?% of 17