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)

? ÷ 2.997 + 799.98 × 8.9 = 9199.978

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

Simplify the following expression.
12 + 2.5 + (1.5 of 4) - 2.6

if $${x\over 9}+{8\over x}=1$$, then the value of x³ is :

If x = 222, y = 223 and z = 224, then find the value of x³+y³+z³-3xyz

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

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)

(1110.02 + 89.81) ÷ ? – $${\sqrt{15}}$$= 15.98

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