The value of $${4- \sqrt{0.04} \over 4+\sqrt{0.4} } $$  is closed to

2x + 4y – 8xy -1 =?

What is the value of $${0.74×1.23×0.13\over (0.37)^{3}+(0.41)^{3}-8(0.39)^{3}}$$ ?

If a² + a + 1 = 0 then the value of a⁹ is. 

5-[4-{3-(3-3-6)}] is equal to:

If 551 ÷ 29 = 19 then 5.51 ÷ 0.0019 = ?

If the sum and difference of two number are 20 and 8 respectively, then the difference of their squares is: 

The square root of a positive number less than 100 lies between