Count each 1 in the following sequence of 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

A. 2
B. 4
C. 5
D. 7
E. 9

Option B

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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  7  6  1  6  7  7  6  8  8  6  9  7  6  8  7

A. Nil
B. One
C. Two
D. Three
E. None of these

Option D

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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  4  2  1  2  4  1  4  6

A. Two
B. Three
C. Four
D. Five

Option C

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How many 7's are there in the following sequence which are precedede by 9 and followed by 6 ?
7  8  9  7  6  5  3  4  2  8  9  7  2  4  5  9  2  9  7  6  4  7

A. 2
B. 3
C. 4
D. 5
E. None of these

Option A

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In the series : 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 frequence ?

A. 253
B. 245
C. 375
D. 865
E. None of these