Evaluate the following :
`(18/25)^2`

Evaluate the following: (17/25)^2

Evaluate the following (-18) div 6

Evaluate the following : (i) 1+.^(20)C_(1)+^(20)C_(2)+^(20)C_(3)+....+^(20)C_(19)+^(20)C_(20) (ii) ^(10)C_(1)+^(10)C_(2)+^(10)C_(3)+.....+^(10)C_(9) (iii)^(25)C_(1)+^(25)C_(3)+^(25)C_(5)+.....+^(25)C_(25) (iv) ^(18)C_(2)+^(18)C_(4)+^(18)C_(4)+^(18)C_(6)+....+^(18)C_(18)

Evaluate the following : sqrt(50) xx sqrt(18)

Evaluate the following: sin 78^@ cos 18^@-cos 78^@ sin 18^@

Find the value of following : (25)^(3)

Add the integers in each of the following : -18, 25, -37

Find the mean of the following data: 19 21 23 25 27 29 31 13 15 16 18 16 15 13

Find the sum in each of the following : 280.69+25.2 + 38