Which of the following is a perfect square as well as a cube ? 

What should come in place of the question mark (?) in the following question?
19.5% of 524 = 50% of ?

When the square of a natural number subtracted from its cube, the result is 48. Find the number: 

Simplification the following equations

A tourist spends daily as many rupees as the number of days of his total tour. If his total expenses were ₹ 361, then how many days did his tour last? 

(5.5)³-(4.5)³ is equal to : 

The value of $$ {5-[2+3(2-2× 2 +5)-5]÷5}\over {4×4÷4}of(4+4÷4 of 4)$$ is:

$$ {\sqrt{784}} × \sqrt{6.25} + 56\%\ of\ 450=?+186$$