In each of the Following number series, one no. is wrong. Find the
odd no?
1)696, 340, 168, 80, 36,14,3
A)696
B)340
C)168
D)80
2)1, 0, 5, 6
A)1
B)0
C)5
3)25, 64 , 6 , 15
A)64
B)6
C)15
D)25
4)64, 55, 81 ,82
A)81
B)82
C)55
D)64
5)64, 83, 19, 38
A)64
B)19
C)83
D)38
6)7864, 9951 , 6982, 7657
A)7864
B)6982
C)7657
D)9951
7)752,853, 936 , 887
A)752
B)853
C)887
D)936
8)32564, 97655, 63225, 61852
A)32564
B)97655
C)63225
D)61852
9) 48, 100, 180,262
A)100
B)180
C)48
D)262
10)Two different numbers when divided by the same divisor, left
remainder 11 and 21 respectively, and when their sum divided by same divisor,
remainder was 4. What is the Divisor?
A)36
B)28
C)14
D)9
E)None of these
11)How many no. lying between 300 and 900, are Divisible by 17?
A)35
B)36
C)17
D)5
E)can’t be Determined.
12)How many digits are required to number a book containing 200
pages?
A)600
B)492
C)372
D)250
E)200
13) The sum of two no. is “s” and their quotient is “p/q”. The
numbers are?
A)ps/q ,qs/q
B)s/p, s/q
C)(s-p)/q, (s-q)/p
D)ps/(p+q), qs/(p+q)
E) none of these
14)Two third of a number is thirty less than the orignal
number.The number is?
A)180
B)90
C)120
D)270
15)The sum of the digits of a two digit number is 8. If the digit
is reversed, the number is decreased by 54.Find the number
A)35
B)44
C)71
D)62
Answers
1.B
2.B
3.B
4.A
5.B
6.D
7.C
8.D
9.D
10.B
11.A
12.B
13.D
14.B
15.C
Explanation:
1. 696-352=344
344-176=168
168-88=80
80-44=36
36-22=14
14-11=3
So 340 is wrong no. in this series.
2. 0 is not in the set of natural no. so it is odd in this series
3. 6 is single digit no. rest are double digit. So 6 is odd.
4. Sum of digit is 10 except 81, 8+1=9, so it is odd.
5. Multiplication of digit is 24 except 19, so 19 is odd.
6. Sum of digit is 25 except 9951, 9+9+5+1=24, so 9951 is odd.
7. I-(II+III)=0 except 887 ,so it is odd in this series.
8. III no. is difference between sum of (I+II) and (IV+V) except 61852. So it is odd.
9. X^3-x^2 form series except 262, so it is odd.
4^3-4^2= 48
5^3-5^2=100
6^3-6^2= 180
7^3-7^2=294 ,
10. Here divisor is same and the remainder is 4 when the sum of two numbers are divided.
So Divisor= (sum of remainder) – ( remainder when sum is divided)
11+21-4 = 28
11. (900-300)/17 = 35 whole 5/17 ,so quotient is 35 ,
so 35 numbers lie .
12. One digit page 1 to 9 = 9,
Two digit page 10to 99=90
Three digit page 100 to 200=101
9*1+90*2+101*3= 492
13.Go through option checking only option D is followed.
14. 2/3* number= number-30, so number =90
15. 71 after reversing 17 ; 71-17= 54
1.B
2.B
3.B
4.A
5.B
6.D
7.C
8.D
9.D
10.B
11.A
12.B
13.D
14.B
15.C
Explanation:
1. 696-352=344
344-176=168
168-88=80
80-44=36
36-22=14
14-11=3
So 340 is wrong no. in this series.
2. 0 is not in the set of natural no. so it is odd in this series
3. 6 is single digit no. rest are double digit. So 6 is odd.
4. Sum of digit is 10 except 81, 8+1=9, so it is odd.
5. Multiplication of digit is 24 except 19, so 19 is odd.
6. Sum of digit is 25 except 9951, 9+9+5+1=24, so 9951 is odd.
7. I-(II+III)=0 except 887 ,so it is odd in this series.
8. III no. is difference between sum of (I+II) and (IV+V) except 61852. So it is odd.
9. X^3-x^2 form series except 262, so it is odd.
4^3-4^2= 48
5^3-5^2=100
6^3-6^2= 180
7^3-7^2=294 ,
10. Here divisor is same and the remainder is 4 when the sum of two numbers are divided.
So Divisor= (sum of remainder) – ( remainder when sum is divided)
11+21-4 = 28
11. (900-300)/17 = 35 whole 5/17 ,so quotient is 35 ,
so 35 numbers lie .
12. One digit page 1 to 9 = 9,
Two digit page 10to 99=90
Three digit page 100 to 200=101
9*1+90*2+101*3= 492
13.Go through option checking only option D is followed.
14. 2/3* number= number-30, so number =90
15. 71 after reversing 17 ; 71-17= 54
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