Mental Ability - Number, Ranking & Time Sequence Questions and Answers
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Q1
Which is the third number to the left of the number which is exactly in the middle of the following sequence of numbers ?
1 2 3 4 5 6 7 8 9 2 4 6 8 9 7 5 3 1 9 8 7 6 5 4 3 2 1
Answer: Option B
Explanation: There are 27 numbers in the given sequence. So, middle number = 14th number = 9. Clearly, the third number to the left of this 9 is 4.
Q2
How many 3's are there in the following sequence which are neither preceded by 6 nor immediately follwed by 9 ?
9 3 6 6 3 9 5 9 3 7 8 9 1 6 3 9 6 3 9
Answer: Option B
Q3
Cunt 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: Option A
Q4
How many 6's are there in the following series of numbers which are preceded by 7 but not immediately followed by 9 ?
6 7 9 5 6 9 7 6 8 7 6 7 8 6 9 4 6 7 7 6 9 5 7 6 3
Answer: Option C
Q5
How many 7's are there in the following series which are not immediately followed by 3 but immediately preceded by 8 ?
8 9 8 7 6 2 2 6 3 2 6 9 7 3 2 8 7 2 7 7 8 7 3 7 7 9 4
Answer: Option C
Q6
Count each 1 in the following sequence f numbers that is immediately followed by 2, if 2 is not immediately followed by 3. How many such 1's are there ?
1 2 1 3 4 5 1 2 3 5 2 1 2 6 1 4 5 1 1 2 4 1 2 3 2 1 7 5 2 1 2 5
Answer: Option B
Q7
How many 7's are there in the following series which are preceded by 6 which is not preceded by 8 ?
8 7 6 7 8 6 7 5 6 7 9 76 1 6 7 7 6 8 8 6 9 7 6 8 7
Answer: Option D
Q8
In the following list of numerals, how many 2's are followed by 1's but not preceded by 4 ?
4 2 1 2 1 4 2 1 1 2 4 4 4 1 2 2 1 2 1 4 4 2 1 4 2 1 2 1 2 4 1 42 1 2 4 1 4 6
Answer: Option C
Q9
How many 7's are preceded by 9 followed by 6 ?
Answer: Option A
Q10
Study the number series given below and answer the questions that folow :
7 8 9 7 6 5 3 4 2 8 9 7 2 4 5 9 2 9 7 6 4 7
Which figures have equal frequency ?
Answer: Option D
Explanation: In the given series, 2 occurs 3 times: 3 occurs once: 4 occurs 3 times: 5 ocurs 2 times; 6 occurs 2 times; 7 occurs 5 times; 8 occurs 2 times and 9 occurs 4times. clearly, the frequency of 5, 6 and 8 is the same i.e., 2.