How many 7s are there in the following sequence which are immediately preceded by 4 but not immediately followed by 2?

How many 5’s are there in the given sequence which are immediately followed by 3, not immediately preceded by 7?8953253855687335775365335798(a) Two(b) One(c) Four(d) Three

Answer

Hint: We start solving the problem by underlining the 5’s in the sequence which were immediately followed by 3 (3 should be just after 5) in the given sequence. We then cross the underlined 5’s that were immediately preceded by 7 (7 should be just before 5). We then count the number of 5’s that were underlined but not crossed in the sequence to get the required answer.

Complete step-by-step answer:
According to the problem, we are given a sequence 8953253855687335775365335798 and we need to find the number of 5’s in this sequence which were immediately followed by 3, but not immediately preceded by 7.
Now, let us underline the 5’s that were immediately followed by 3 (3 should be just after 5) in the given sequence as shown below:
8953253855687335775365335798.
Now, let us cross the underlined 5’s which were immediately preceded by 7 (5 should be just before 5) in the given sequence as shown below:
8953253855687335775365335798.
No, we can see that there are a total of three 5’s present in the given sequence satisfying the given conditions.
So, the total number of 5’s in this sequence which were immediately followed by 3, but not immediately preceded by 7 is three.
∴ The correct option for the given problem is (d).

So, the correct answer is “Option (d)”.

Note: We should not confuse with preceding and following the numbers while solving the numbers. Whenever we get this type of problem, we try to solve it by marking the required numbers first as this will reduce confusion while solving the problem. Similarly, we can expect problems to find the total number of 5’s that were immediately preceded by 3 and immediately followed by 7.

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Important Questions on Alphabet Test

How many 4 'immediately preceded by 7 but not immediately followed by 4 are there in the following series of numbers?

7 4 4 7 5 3 4 7 4 7 3 4  7 7 5 6 7 4 7 7 4 4 7

How many 5's are there in the following sequence which are immediately followed by 2 and also are immediately preceded by8?

8 5 2 7 8 5 8 8 5 8 2 8 5 2 5 8

How many 0's are there in the following number series each of which is followed by 7 and preceded by 9?

3 5 7 0 9 0 8 0 7 0 1 0 7 9 0 9 2 3 4 0 7 3 4 5 9 0 2

Important Points to Remember on Alphabet Test

Alphabet test

1. The positional value of letters is their place in the English alphabetical series. A=1, B =2, C=3, …, Y=25, Z=26.
2. Reverse alphabetical order starts from Z, where Z=1, Y=2,  …, B=25, A=26.
3. To remember the position value, the easiest way is to remember EJOTY, where E=5, J=10, O= 15, T=20, Y=25, and the place value other letters can be found using these five letters.
4. The questions which ask us to find the number of letters having the same gap as in the English alphabetical series, we write the position values of each given letter and then start comparing.

In question, where the word is jumbled, and we are asked to find the number of letters occupying the same place as in the original word, we write the two words one below the other and then compare.

1. In alphabetical order of words, we need to arrange the words according to the Dictionary pattern. We start comparing the first letters of the given words and arranging accordingly. If the first letter is the same for more than one word, we check the second letter and so on.
2. In some questions, we need to change the alphabets according to the given condition and then compare the given elements.
3. In a few questions, half of the word is in the forward order and the other half is in the backward order.
4. Position from left = Total numbers – Position from right +1
5. In some questions, a word is given, and we need to form different words using specific alphabets of the given word. In such questions, try all possible ways to find the maximum meaningful English word using the given letters.

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