Does there exist a GP containing 27,8 and 12 as three of its terms ? If it exists, how many such progressions are possible ?

Does there exist a geometric progression containing 27, 8 and 12 as three of its terms? If it exists, how many such progressions are possible ?

How many acyclic isomers of C_5H_(12) are possible ?

Where Pituitary gland exists? How many lobes it has?

How many carbon atoms exist in fullarene?

Do thenre exist integers x such that 12x =5 (mod 8)?

ABO blood grouping is controlled by gene I which has three alleles and show co-dominance. There are six genotypes. How many phenotypes in all are possible?

The first term of G.P. is 27 and 8th term is 1/81 . Find the sum of its first 10 terms.

3-methylpent-2-ene reacts with HBr in the presence of peroxide to yield an addition compound. How many three dimensional isomers are possible for this addition compound-

In an assembly of 10 scholars , three are mathematicians and three are physicists , the others are both physicists and mathematicians . There are two rows containing 5 chairs and it is intended that all mathematicians are to be seated in one row and the physicsts in the other , the remaining scholars are to be seated in either row in the vacant positions left .In how many ways can all the scholars be seated ?