In following questions, a sequence of groups of alphabets and numbers is provided with one term missing , Choose the missing term from options. AB, BA, ABC, CBA, ABCD, ?

The first group of letters is reversed to obtain the second group. The second group is reversed and the next consecutive letter is added to it to obtain the subsequent group..

All these 6 members of a family A, B, C, D, E, F are travelling together. B is the son of C but C is not the mother of B, A and C are a married couple. E is the brother of C. D is the daughter of A. F is the brother of B. Who is the wife of E?

B is the son of C but C is not the mother of B means C is the father of B. A is married to C means A is the mother of B. F is brother of B means F is son of A and C. D is daughter of A means D is daughter of A and C. Clearly from the data available the wife of E cannot be determined..

Excluding stoppages, the speed of train is 50 km per hour and including stoppages it is 40 km per hour. For how many minutes does the train stop per hour?

Due to stopages it is it covers 10 km less.

Time taken to cover 10 km= (10/50)*60 min = 12 min

.
Jame had $21 left after spending 30% of the money he took for shopping. How much money did he take along with him?

Let the money he took for shopping be m.

Money he spent = 30% of m

= 30/100 x m

= 3/10 m

Money left with him= m-3/10

m=(10m -3m)/10=7m/10

But money left with him= $21

Therefore 7m/10 =$21

m=$21 x 10/7

m =$30

Therefore, the money he took for shopping is $30.

A is the brother of B. B is the brother of C. D is the father of A. Based on these three statements, which of the following statement cannot be definitely true?

Option (D)

A is the brother of B and B is the brother of C. So, C may be the brother or sister of A.

A test has 30 questions. If Ammy gets 70% correct, how many question did Ammy missed?

The number of correct answers is 70% of 30 or 70/100 x 30.

70/100 x 30 = 21

Since the test has 30 questions and she got 21 correct answers, the number of questions she missed is 30-21=9

Ammy missed 9 questions.

.
Choose or find odd letter group

VT , MQ , PR , DF , FG

Putting A = 1, B = 2, ....... and so on, we have:

VT = V + T = 22 + 20 = 42 (even);

MQ = M + Q = 13 + 17 = 30 (even);

PR = P + R = 16 + 18 =34 (even);

DF = D + F = 4 + 6 = 10 (even);

FG = F + G = 6 + 7 = 13 (odd).

.
There are 6 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. Which of the following is a group of brother ?

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. Clearly, B and A are brothers. F is the brother of C. So, three brothers are A,B,F..