Which smallest number must be added to 2203 so that we get a perfect square? 

What is the square root of 0.09 ?

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

(0.85% of 405) +(2.25% of 550)=?

Direction : What should come in place of the question (?) in the following question.

140% of 450 + 24% of 650 =?

Direction : What should come in place of the question (?) in the following question.

(47 × 588) ÷ ( 28 × 120)=?

If (x +y) = 6 and x² + y² = 20 then find the value of (x - y) ².

Find the value of given expression.

30 – [40 – {56 – (25 – 13 – 12)}]

Simplify the following equation.
$${(785.785.785+435.435.435) \over(785)^{2}+(435)^{2}-(785)(435)}$$