$5.6 \times 12.5 \div 0.5 + 15.5 = ? + 49.5$

What least number must be subtracted from $1294$ so that the remainder when divided by $9, 11, 13$ will leave in each case the same remainder $6$?

$6 - \left[ \frac{5}{6} + \left\{ 3 \frac{7}{8} - 2 \frac{1}{3} + 1 \frac{7}{9} \right\} \right] = ?$

$[(7.98)^{2} - (13.002)^{2} + (4.02)^{3}]^{2} = ?$

The expression $\frac{8.25 \times 8.25 + 6.75 \times 6.75 - 2 \times 8.25 \times 6.75}{8.25 \times 8.25 - 6.75 \times 6.75}$ when simplified equals:

The product of two numbers is $120$. The sum of their squares is $289$. The sum of the two numbers is