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

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

The value of $$ \sqrt{11.981+7\sqrt{1.2996}}$$ is closest to 

Direction: what should come in place at question mark(?).

45% of 224×?% of 120=8104.32

If 1.5 a=0.04 b then $$ {b-a\over b+a}$$.

Simplify : $$ {(7) ^{2} ÷(7^{1\over 2})^{4}}$$

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

 If $$ x=\sqrt{(1.96)}-\sqrt{(0.04)}$$ then the value of x is