Compare the following:-
`(-21)-(-21) square (-21)+(-21)`

Compare the pair of the ratios : (5)/(18),(17)/(21)

? - (8)/(21)=(8)/(21)

The additive inverse of (21)/(112) is -(21)/(112)

Fill in the blank boxes: (14)/(21)= (square)/(3)= (6)/(square)

A=(1,3,-2) is a vertex of triangle ABC whose centroid is G=(-1,4,2) then length of median through A is sqrt(21) 3sqrt(21) sqrt(21)/2 (3sqrt(21))/(2)

(4)/(7)-:(2)/(21)

Sum of the squares of the length of the tangents from the points (18, 18), (10, 20) and (21, 21) to the circle x^(2) + y^(2) =25 is equal to ________ .

Correct the following equations by interchanging the two signs. 16+4-:2-21xx7=21

Find the mean, median and mode of the following data: (i) 7, 19, 19, 7, 25, 7 (ii) 21, 24, 21, 6, 15, 18, 21, 45, 9, 6, 27 and 15