QUESTIONS ON REASONING (PART-6)
QUESTIONS ON REASONING (PART-6)
QUERY 101
Find wrong number
9, 19, 40, 83, 170, 340
40
83
170
340
Krishna Singh Thakur
9*2 + 1 = 19
19*2 + 2 = 40
40*2 + 3 = 83
83*2 + 4 = 170
170*2 + 5 = 345
So the wrong number is 340 (option ‘4’)
QUERY 102
Find wrong number in 0, 7, 28, 63, 124, 215
7
215
63
28
MAHA GUPTA
Careful examination will say that every number is subtraction of 1 from cube of a natural number starting from 1; see how
0 = 1^3 – 1
7 = 2^3 – 1
So the next number must be 26 in place of 28 (option ‘4’)
26 = 3^3 – 1
63 = 4^3 – 1
124 = 5^3 – 1
215 = 6^3 – 1
QUERY 103
Find wrong number
5, 13, 29, 61, 120, 253
61
253
29
120
MAHA GUPTA
Every number in the series is addition of 3 to double of its previous; see how
5*2 + 3 = 13
13*2 + 3 = 29
29*2 + 3 = 61
so the next number = 61*2 + 3 = 125; not 120 (option ‘4’)
125*2 + 3 = 253
QUERY 104
13 : 19 : : 21 : ?
141
14
81
41
MAHA GUPTA
LHS
First and second digits of the second numbers are squares of the first and second digits of the first number respectively; see how
1^2 = 1
3^2 = 9
Therefore the desired number of RHS
2^2 = 4
1^2 = 1
Means 41 (option ‘4’)
QUERY 105
Find odd number
27, 125, 216, 343
216
343
125
27
MAHA GUPTA
27 (option ‘4’). The other numbers are cubes of consecutive numbers, whereas 27 not.
QUERY 106
6 : 64 : : 11 : ?
144
169
121
124
MAHA GUPTA
The second number on each side is the square of 2+the first number; see how
LHS
64 = (2+6)^2 = 8^2
So the required number = (2+11)^2 = 13^2 = 169 (option ‘2’)
QUERY 107
If 55 + 66 = 33 , 22 + 99 = 33; then
44 + 88 = ?
38
40
33
36
MAHA GUPTA
Number on RHS is three times of the sum of one of the digits of each number on LHS; see how
(5+6)*3 = 33
(2+9)*3 = 33
Hence the required number = (4+8)*3 = 36 (option ‘4’)
QUERY 108
If LONG is IG; what will be NAIL?
MAHA GUPTA
L = 12; O = 15. Hence L+O = 27; 27/3 = 9 = I
N = 14; G = 7. Hence N+G = 21; 21/3 = 7 = G
So LONG = IG
Now N = 14; A = 1. Hence N+A = 15; 15/3 = 5 = E
I = 9; L = 12. Hence I+L = 21; 21/3 = 7 = G
So NAIL = EG (answer)
QUERY 109
MAHA GUPTA
Multiply the number of the outer triangle by its predecessor and 3 to get the number of the adjacent triangle; see how
2*1 + 3 = 5
3*2 + 3 = 9
4*3 + 3 = 15
5*4 + 3 = 23 (answer)
6*5 + 3 = 33
7*6 + 3 = 45
QUERY 110
2 * 2 = 44
4 * 4 = 168
6 * 6 = 3612
9 * 9 = ?
MAHA GUPTA
First square the digit of LHS and then add to get RHS; see how
2^2 = 4; 2+2 = 4. RHS = 44
4^2 = 16; 4+4 = 8. RHS = 168
6^2 = 36, 6+6 = 12. RHS = 3612
Therefore the required number
9^2 = 81, 9+9 = 18. RHS = 8118
QUERY 111
Find missing number
8 9 10
5 4 3
28 ? 16
12 25 14
Deepak Sharma
Column-I: 8*5 – 12 = 28
Column-III: 10*3 – 14 = 16
Therefore, Column-II: 9*4 – 25 = 11 (answer)
QUERY 112
MAHA GUPTA
TYRE : BICYCLE. PETAL is a part of a flower that can be separated intact; likewise TYRE is a part of a bicycle that can be separated intact. SALT though can be a part of pepper, but can’t be separated from it.
QUERY 113
1, 3, 8, 19, 42, ?
65
71
89
93
MAHA GUPTA
Every number in the sequence is addition of a number in ascending order to its preceding number in sequence 1st, 2nd, 3rd, 4th; see how
1st number after 1 is 2; 1+2 = 3
2nd number after 3 is 5; 3 +5 = 8
3rd number after 8 is 11; 8+11 = 19
4th number after 19 is 23;19+23 = 42
Hence the required number
5th number after 42 is 47; 42+47 = 89 (option ‘3’)
QUERY 114
Karan Mehta
Can’t be energy and power because of irrelevant relationship; can’t be cells as its number can vary in a battery.
TERMINALS (option ‘C’) is right option as there are two two poles in a magnet.
QUERY 115
IC : 6 :: DP : ??
14
10
12
16
MAHA GUPTA
I = 9; C = 3
2nd term of LHS = (9+3)/2 = 6
D= 4; P = 16
Therefore the 2nd term of RHS = (4+16)/2 = 10 (option ‘2’)
QUERY 116
MAHA GUPTA
One should take these things in general; to think what happens generally at top level will lead us to wrong estimation for sure. All these three categories of people may be intermixed no doubt. So only and only answer is option ‘2’.
QUERY 117
MAHA GUPTA
Option ‘B’. One should take these things in general; to think what happens generally at top level will lead us to wrong estimation for sure. All these three categories of people may be intermixed no doubt. So only and only answer is option ‘B’.
QUERY 118
MAHA GUPTA
Option ‘1’. The middle circle represents ANTIBIOTICS. A capsule can contain an antibiotics inside or not, likewise an injection too can be of an antibiotics or not. But a capsule and injection are entirely two different things.
QUERY 119
120, 440, 960, 1680, ?
2600
3240
3040
2400
MAHA GUPTA
The difference in two consecutive number is increasing by 200; see how
440 – 120 = 320
960 – 440 = 520
1680 – 960 = 720
So the required number = 1680 + 920 = 2600 (option ‘1’)
QUERY 120
Find the odd word
wave
current
tide
storm
MAHA GUPTA
TIDE (option ‘3’). TIDE is a regular rise and fall in the level of sea caused by the pull of the moon and sun, whereas cause of all the other things mentioned is different.