re

is the owner of the post still available ? I don't think so , because it was posted long back , if he is there please post the OA , IMO D , what is the OA , no response from the owner of the post from long back I think.

re

the answer should be C ,because multiples of 3 are 3,6,9,12,15,18,21.....where 3,9,15 and 21 are not multiples of 6. so I is discarded multiples of 9 are 9,18,27,36,45,54,63....where 9,27,45 and 63 not multiples of 6 ...so II also discarded . multiples of 12 are 24, 36, 48, 60, 72 ..all the multiple...

perplexed

. If•represents one of the operations +, –, and ×,k . (r + m ) = ( k . r ) + ( k . m ) is for all numbers k, r and m?
(1) k•l is not equal to l•k for some numbers k.
(2) •represents subtraction.


I didn't understand the problem, anyone please explain this in detail

permutations and combination

A certain company assigns employees to offices in such a way that some of the offices can be empty and more than one employee can be assigned to an office. In how many ways can the company assign 3 employees to 2 different offices? A. 5 B. 6 C. 7 D. 8 E. 9 friends please explain , I am getting only ...

prime factors

What is the number of prime factors contained in the product 30^7 * 22^5 * 34^11 ?

23
44
46
48
53

do we need to calculate all the factors involved in the multiplication ?

OA is E

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odds and even

. If k is an even integer and p and r are odd integers, which of the following CANNOT be an integer?
(A) r/k

(B) k/p

(C) p/r

(D) kp/r

(E) kr/p