In each of the following questions, one number series is given.
In each series one number is wrong. After searching the wrong number find out the correct number in its place.
Q 1 : 5 , 10 , 17 , 26 , 39 , 50 , 65
Q 2 : 3 , 5 , 7 , 11 , 13 , 17 , 21
Q 3 : 2 , 9 , 17 , 65 , 126 , 217 , 344
Q 4 : 4 , 25 , 100 , 289 , 652 , 1369 , 2500
All the best !
Q1. 5, 10, 17, 26, 39, 50, 65
To the first term 5 is added to get the second
To the second term 7 is added to get the third
To the third term 9 is added to get the fourth
Continuing this sequence 11 must be added to get the fifth term.
Hence fifth term is 26+11 = 37 and not 38.
Now adding 13 to 37 gives 50 and adding 15 to 50 gives 65.
Hence in the above sequence 5,7,9,11,13,15 are respectively added to the previous terms to get the next term in the sequence.
Q 2 : 3 , 5 , 7 , 11 , 13 , 17 , 21
All the terms are prime numbers other than 21. It must be 19 and not 21
Q 3 : 2 , 9 , 17 , 65 , 126 , 217 , 344
If you observe the sequence it is of the form
i.e;
Hence the third term must be 28 and not 17.
Q 4 : 4 , 25 , 100 , 289 , 652 , 1369 , 2500
The sequence above is of the formTo the base of each number 3, 5 , 7, 9, 11, 13 are added
Hence the fifth term must be and not 652.
Regards,
I not find the answer for 2nd question. Q1. 5, 10, 17, 26, 39, 50, 65 To the first term 5 is added to get the second To the second term 7 is added to get the third To the third term 9 is added to get the fourth Continuing this sequence 11 must be added to get the fifth term. Hence fifth term is 26+11 = 37 and not 38. Now adding 13 to 37 gives 50 and adding 15 to 50 gives 65. Hence in the above sequence 5,7,9,11,13,15 are respectively added to the previous terms to get the next term in the sequence.
Q 3 : 2 , 9 , 17 , 65 , 126 , 217 , 344 If you observe the sequence it is of the form i.e; Hence the third term must be 28 and not 17.
Q 4 : 4 , 25 , 100 , 289 , 652 , 1369 , 2500 The sequence above is of the form To the base of each number 3, 5 , 7, 9, 11, 13 are added Hence the fifth term must be and
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