A car travels first half distance between two places with a speed of 40 kilometre per hour and rest of half distance with a speed of 60 km per hour. The average speed of car is:

Let the total distance covered be"s" km.

Total time taken,

=(s/2)/30+(s/2)/60

=3s/120

Average speed,

=s/(3s/120)

=s(120/3s)

=40 km/hr

.
In following alphabet series , one term missing as shown by question mark . Choose missing term from options.

JE, LH, OL, SQ, ?

The first letter of the first, second, third,... terms are respectively moved two, three, four,... steps forward while the second letters of three terms are respectivvely moved three, four, five,... steps forward to obtain the corresponding letters of the successive terms..

There are six persons A, B, C, D, E and F.
C is the sister of F. B is the brother of E's husband. D is the father of A and
grandfather of F. There are two fathers, three brothers and a mother in the
group. How many male members are there in the group?

Option (D)

D is father of A and grandfather of F. So, A is father of F. Thus, D and A are the two fathers. C is the sister of F. So, C is the daughter of A. Since there is only one mother, it is evident that E is the wife of A and hence the mother of C and C and F. So, B is brother of A. There are three brothers. So, F is the brother of C. A, the father, is male. B, the brother, is male. C, the sister, is female. D, the grandfather, is male. E, the mother, is female. F, the brother, is male. So, there are four males.

.In following questions, a sequence of groups of alphabets and numbers is provided with one term missing , Choose the missing term from options. AYD, BVF, DRH, ?, KGL

The first letters of the first, second, third and fourth are moved one, two, three and four steps forward respectively to obtain the first letter of the successive terms. The second letters of the first, second, third and fourth terms are moved three, four, five and six steps backward respectively to obtain the second letters of the successive terms.The last letters of the terms are alternate.

A+B means A is the father of B;

A-B means A is the wife of B;

AxB means A is the brother of B;

AÃ·B means A is the daughter of B.

If PÃ·R+Q, which of the following is true?

PÃ·R+Q means P is the daughter of R who is the father of Q i.e. P is the sister of Q..

Which term comes next in the series : YEB, WFD, UHG, SKI ?

Clearly, the first letter of each term is moved two steps backward to obtain the first letter of the next term. So, the first letter of the missing term will be Q. The second letter of the first, second, third, fourth terms are respectively moved one, two, three and four steps forward to obtine the corresponding letter of the subsequent term. So, the second letter in the missing term

will be O. The third letter is alternately moved two and three steps forward to obtain the corresponding letter of the subsequent term. So, the third letter in the missing term will be L. Thus, the missing term is QOL. Hence, the answer is (a).The third letters of the first, second, third, fourth and fifth terms are moved seven, eight, nine, ten and eleven steps forward respectively to obtain the third letter of the successive terms. Thus, the missing term would be ZKW. Hence, the answer is (a).

.
In following alphabet series , one term missing as shown by question mark . Choose missing term from options.

AZ, GT, MN, ?, YB

The first letter of each term is moved six steps forward while the second letter is moved six steps backward to obtain the corresponding letter of the next term..

Which term will replace the question mark in the series:

ABD, DGK, HMS, MTB, SBL, ?

ABD, DGK, HMS, MTB, SBL, ?

Clearly, the first letters of the first, second, third, fourth and fifth terms are moved three, four, five, six and seven steps forward respectively to obtain the first letter of the successive terms.

The second letters of the first, second, third, fourth and fifth terms are moved five, six, seven, eight and nine steps forward respectively to obtain the second letter of the successive terms.

The third letters of the first, second, third, fourth and fifth terms are moved seven, eight, nine, ten and eleven steps forward respectively to obtain the third letter of the successive terms.

Thus, the missing term would be ZKW.

Hence, the answer is (A)..

A family consists of 6 members P Q R S T and U . There are two married couple points Q is a doctor and the father of T.U is grand father of R and is a contractor. S is grandmother of T and is a housewife world is one doctor, one contractor, nurse , one house wife and two students in the family.

who is the husband of p?

Q, the doctor, is the father of T. S, the house wife,is the grandmother of T and hence the mother of Q. since there are only two married couple one being that of Q, the grandfather of R i .E. U must be married to S. Thus, R and T will be both children of Q and these must be the student. So, P, who remains, she'll be the wife of Q and she alone can be the nurse. Thus, U must be the contractor , The husband of P will be Q..