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

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

45% of 224×?% of 120=8104.32

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

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

If $$ {\sqrt{1+{473\over{256}}}=1+{x\over 16}}$$ then what does x equal to ?

Find the value of given expression. 

[76 – {90 ÷ 5 ⨯ (24 – 36 ÷ 3) ÷ 3}] 

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

The product of two whole numbers is 37. The square root of the difference of the numbers is