Blood Relations Set from RBI Grade B Paper

blood relation


A man has three sons, and each of his sons has three sons. In figuring : one man and his father are a pair of "father and son". The same man and his son are a pair of "father and son". In other words, any
one person may figure in any number of pairs, so long as he is paired with a different person each time. Knowing this, answer the following. 

1. How many pairs of cousins are there?
a. 3
b. 9
c. 12
d. 27

2. How many pairs of father and son are there?
a. 6
b. 12
c. 18
d. 9

3. How many pairs of brother are there?
a. 9
b. 11
c. 12
d. 15

4. How many pairs of uncle and nephew are there?
a. 18
b. 17
c. 16
d. 15

5. How many pairs of grandfather and grandson are there?
a. 8
b. 7
c. 9
d. 10

6. How many people are there in the group?
a. 12
b. 13
c. 20
d. 25
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