The smallest number that must be subtracted from 1000 to make the resulting number a perfect square is 

Evaluate: $$ {9।3-5।-5।-5।4।÷10\over-3(5)-2×4÷2}$$

If $$ {0.7\over 1-6c}=-0.2$$ then what is the value of c.

The value of   $${(75.8)^2-(55.8)^2\over20}$$

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

$$ {4\over 7}×{2{4\over 5}÷{2\over 5}=?}$$

If the sum of the squares of three consecutive natural numbers is 110, then the smallest of these natural numbers is:

Given that ( 1² +2²+3²+………..+10²)=385, the value of (2²+4²+6²+……20²) is equal to

Find the value of given equations

$$\left({216\over1} \right) ^{-{2\over3}}÷\left({27\over1} \right) ^{-{4\over3}}=? $$