Reasoning - Number, Ranking & Time Sequence
6.
In the given series how many pairs of alternate numbers have a difference of 2 ?
6 4 1 2 2 8 7 4 2 1 5 3 8 6 2 1 7 1 4 1 3 2 8 6
Answer
Difference between pairs of alternate numbers i.e. (6,1), (4,2), (1,2), (2,8), (2,7), (8,4), (7,2) (4,1), (2,5), (1,3), (5,8), (3,6), (8,2), (6,1), (2,7), (1,1), (7,4), (1,1), (4,3), (1,2), (3,8), and (2, 6).
Of these, the pairs with a difference of 2 are (4,2) and (1,3).
Clearly, there are two such pairs.
Answer :
Option BExplanation :
Difference between pairs of alternate numbers i.e. (6,1), (4,2), (1,2), (2,8), (2,7), (8,4), (7,2) (4,1), (2,5), (1,3), (5,8), (3,6), (8,2), (6,1), (2,7), (1,1), (7,4), (1,1), (4,3), (1,2), (3,8), and (2, 6).
Of these, the pairs with a difference of 2 are (4,2) and (1,3).
Clearly, there are two such pairs.
7.
Count each 7 which is not immediately preceded by 5 but is immediately followed by either 2 or 3. How many such 7's are there ?
5 7 2 6 5 7 3 8 3 7 3 2 5 7 2 7 3 4 8 2 6 7 8
Answer
5 7 2 6 5 7 3 8 3 7 3 2 5 7 2 7 3 4 8 2 6 7 8
Answer :
Option AExplanation :
5 7 2 6 5 7 3 8 3 7 3 2 5 7 2 7 3 4 8 2 6 7 8
8.
If the numbers from 5 to 85 which are exactly divisible by 5 are arranged in descending order, which would come at the eleventh place from the bottom ?
Answer
The required numbers in descending order are :
85, 80, 75, 70, 65, 60, 55, 50, 45, 40, 35, 30, 25, 20, 15, 10, 5.
The eleventh number from the bottom is 55.
Answer :
Option EExplanation :
The required numbers in descending order are :
85, 80, 75, 70, 65, 60, 55, 50, 45, 40, 35, 30, 25, 20, 15, 10, 5.
The eleventh number from the bottom is 55.
9.
In the following series, how many such odd numbers are there which are divisible by 3 or 5, then followed by odd numbers and then also followed by even numbers ?
12, 19, 21, 3, 25, 18, 35, 20, 22, 21, 45, 46, 47, 48, 9, 50, 52, 54, 55, 56
Answer
12, 19, 21, 3, 25, 18, 35, 20, 22, 21, 45, 46, 47, 48, 9, 50, 52, 54, 55, 56
Answer :
Option CExplanation :
12, 19, 21, 3, 25, 18, 35, 20, 22, 21, 45, 46, 47, 48, 9, 50, 52, 54, 55, 56
10.
If the positions of the first and the sixth digit of the sequence of numbers 8 9 0 3 2 1 4 6 7 5 are interchanged, the second and the seventh and so on, which number would be seventh from the right end?
Answer
After interchanges new sequence becomes 1 4 6 7 5 8 9 0 3 2.
So, seventh number from the right end is 7.
Answer :
Option CExplanation :
After interchanges new sequence becomes 1 4 6 7 5 8 9 0 3 2.
So, seventh number from the right end is 7.
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