Mathmetics

ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams

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Q1.
Direction: Insert the appropriate number in the place of "?" mark and make a complete number series.

?    3638    3494     3413     3377    3368
1) 3748 2) 3763
3) 3863 4) 3883
5)None of these
Answer : 3863
Explanation : The sequence is :    - (15)2 , - (12)2, - (9)2 , - (6)2 , - (3)2 and so on.
So, the answer should  (3638 + 225 ) = 3863 .
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Q2.
Direction: Insert the appropriate number in the place of "?" mark and make a complete number series .

8   10    40    ?   168   170
1) 20 2) 32
3) 42 4) 48
5)None of these
Answer : 42
Explanation : The sequence is 8 + 2 =10 , 10 x 4 = 40 , 40 + 2 = 42 , 42 x 4 = 168 , 168 +2 = 170  and so on.
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Q3.
Direction: Insert the appropriate number in the place of "?" mark and make a complete number series .
1   2    ?  36   85   166 
1) 7 2) 10
3) 11 4) 16
5)None of these
Answer : 11
Explanation : The sequence is 1+(1)2 =2, 2 + (3)2 =11 , 11 + (5)2 and so on.
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Q4.
Find the odd man out in the following number series.

835,   734,   642,   751,   853,   981,   532
1) 532 2) 751
3) 853 4) 981
5)None of these
Answer : 751
Explanation : In each number except 751, the difference of third and first digit is the middle one.
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Q5.
Find the odd man out in the following number series.

6,   9,   15,   21,   24,   28,   30
1) 28 2) 21
3) 24 4) 30
5)None of these
Answer : 28
Explanation : Each of the numbers except 28, is a multiple of 3.
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Q6.
Find the odd man out in the following number series.

1,   4,   9,   16,   23,   25,   36
1) 9 2) 23
3) 25 4) 36
5)None of these
Answer : 23
Explanation : Each of the numbers except 23, is perfect square.
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Q7.
Find the odd man out in the following number series.

2,   5,   10,   17,   26,   37,   50,   64
1) 26 2) 37
3) 50 4) 64
5)None of these
Answer : 64
Explanation :
 The series is (11)+1 , (22)+1 , (33)+1 , (44)+1 , (55)+1 , (66)+1 , (77)+1 , (88)+1

But, 64 is out of pattern.

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Q8.
Find the odd man out in the following number series.

10,   14,   16,   18,   21,   24,   26
1) 18 2) 21
3) 24 4) 26
5)None of these
Answer : 21
Explanation : Each of the numbers except 21 is an even number.
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Q9.
Find the odd man out in the following number series.

16,   25,   36,   72,   144,   196,   225
1) 36 2) 72
3) 196 4) 225
5)None of these
Answer : 72
Explanation : Each of the numbers except 72 is a perfect square.
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Q10.
Find the odd man out in the following number series.

396,   462,   572,   396,   427,   671,   264
1) 264 2) 396
3) 427 4) 671
Answer : 427
Explanation : In each number except 427, the middle digit is the sum of other two.
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