Write true or false for of the following
13:12::12:13

Write true or false : 32:64 : :6:12

Write true or false : 22:11: :12:6

Write true or false : 90:30: : 36:12

Write the numerator and denominators of the following fractional numbers - 11/13

Write true or false, correct those that are False:-12 and +12 represent on the number line the same integer.

Write the additive inverses of each of the following rational numbers : 7/(-13)

Find the mean deviation about the mean for the following data: 6, 7, 10, 12, 13, 4, 8, 12

Write true or false. i) 15 : 30 :: 30 : 40, ii) 22 : 11 :: 12 : 6.

Find the mean deviation about the median for the following data 13,17,16,11,13,10,16,11,18,12,17

Find the values of the following: tan("Cosec"^(-1)13/12)