When will the Indian Navy commission stealth frigates

Find the value of ‘x’ if (5 × 196 – 340 ÷ 17) ÷ 20 = √1600 – x.

Find the value of 45 - 3 x (4 of 6 + 12 ÷ 3 × 6 – 4 × 5) + 6.

√0.49 + √6.25 + √1.44 + √1.21 =? % of 125

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

If 1.123 × 3.211 = 3.122 + ______________, then the number in blank space is

Find the simplified value of the following expression:

6² + 12² × 5 - {27² + 16² - 42²}

What should come in place of the question mark (?) in the following question?

2 – [6 – {3 + (–4 + 5 + 1) × 8} + 12] = ?

What will come in the place of question mark (?) in the given expression?