If $${1\over 4.263}=0.2346$$, find the value of $${1\over0.0004263}.$$

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

?³ + 115.86 – 24.93 × 1.90 = 190.97

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

(16.05)² + (8.96)² - 7.03 × 3.98 =? + 197.99

The value of $$5-{8+2\sqrt{15} \over4}-{{1}\over8+2\sqrt{15}}$$ is equal to:

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

468.02 + 79.91 ÷ 5.01 = ?²

Evaluate the following:
5 - [96 ÷ 4 of 3 - (16 - 55 ÷ 5)]

If a + b + c = 2, a² + b² + c² = 26 then the value of a³ + b³ + c³ – 3abc is

If p – 2q = 4, then the value of p³ – 8q³ – 24pq – 64 is :