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Number and Ranking Sequence Number Sequencing 1. How many 5’s are there in the following sequence which are immediately followed by 3 but not immediately preceded by 7? 8 9 5 3 2 5 3 8 5 5 6 8 7 3 3 5 7 7 5 3 6 5 3 3 5 7. 2. How many even numbers are there in the following sequence of numbers which are immediately followed by an odd number as well as immediately preceded by an even number? 8 6 7 6 8 9 3 2 7 5 3 4 2 2 3 5 5 2 2 8 1 1 9 3. How many 3’s are there in the following sequence which are neither preceded by 6 nor immediately followed by 9? 9 3 6 6 3 9 5 9 3 7 8 9 1 6 3 9 6 3 9 4. How many odd numbers are there in the sequence which are immediately followed by an odd number? 5 1 4 7 3 9 8 5 7 2 6 3 1 5 8 6 3 8 5 2 2 4 3 4 9 6 5. In the following series of numbers, find out how many times, 1, 3 and 7 have appeared together, 7 begin in the middle and 1 and 3 on either side of 7? 2 9 7 3 1 7 3 7 7 1 3 3 1 7 3 8 5 7 1 3 7 7 1 7 3 9 0 Number and Ranking Sequence Page 1 of 2 Rank Sequencing 1. Rahul ranked ninth from the top and thirty-eighth from the bottom on a class. How many students are there in the class? Sol: 9+38-1 = 46 students. 2. In a row of 21 girls, when Monika was shifted by four places towards the right, she became 12th from the left end. What was her earlier position from the right end of the row? Sol: 14th s 1 2 3 4 5 6 7 8 9 10 11 M 13 14 15 16 17 18 19 20 21 3. In a row of boys, Deepak is seventh from the left and Madhu is twelfth from the right. If they interchange their positions, Deepak becomes twenty-second from the left. How many boys are there in the row? Sol: 12 + 22 – 1 = 33 boys 4. Manisha ranked sixteenth from top and twenty-ninth from the bottom among those who passed an examination. Six boys did not participate in the competition and five failed in it. How many boys were there in the class? Sol: 16+29-1+6+5 = 55 5. In a class of 60, where girls are twice that of boys, Kamal ranked seventeenth from the top. If there are 9 girls ahead of Kamal, how many boys are after him? Sol: Let the number of girls be X. X + 2X = 60 X = 20 20 boys and 40 girls Kamal 17th rank 16 people ahead of him. 9 girls ahead 7 boys ahead (20-1-7) 12 boys after him. Number and Ranking Sequence Page 2 of 2