The average value of five numbers is 40. If a number is deleted from the five number, then the average will be reduced by 10. Find the deleted number.

Simplify :[[[1/2]²]^-2]^-1 = ?

The 9th term of the sequence 1,1,2,3,5,8,13,... is

Simplify : (2³)²/5×(125)^2/3/2⁴=

The curved surface are of a right circular cylinder whose radius is a units and height b units is

The value of 25% of 1200 is