Logical Reasoning Questions and Answers
Complete the series 2, 3, 6, 15, ?, 123
First term → 2
Second term → (2 *3 -3) = 3
Third term → (3 *3 -3) = 6
Fourth term → (6 *3 - 3) = 15
sixth term → (15 *3 - 3) = 42
In the following number series a wrong number is given. Find out the wrong number.
1, 3, 10, 21, 64, 129, 356, 777
The given pattern is,
2nd term → 1*2+1 = 3
3rd term → 3*3+1 = 10
4th term → 10*2+1 = 21
5th term → 21*3+1 = 64
6th term → 64*2+1 = 129
7th term → 129*3+1= 388
So, 7th term 356 is wrong and must be replaced by 388.
Complete the series 9, 27, 31, 155, 161, 1127, ?
Given pattern is,
2nd term → 9*3 = 27
3rd term → 27+4 = 31
4th term → 31*5 = 155
5th term → 155+6 = 161.
6th term → 161*7 = 1127
Missing term → 1127+8 = 1135.
Complete the series 2, 7, 27, 107, 427, ?
The pattern is,
2nd term → 2 +(5 *12) = 7
3rd term → 7 +(5 *22) = 27
4th term → 27 +(5 *42) = 107
5th term → 107 +(5 *82) = 427
Missing term → 427 +(5 *162) = 1707
Sunday, Monday, Wednesday, Saturday, Wednesday, Monday, .....
Sunday to Monday = no gap
Monday to Wednesday = One day gap.
Wednesday to Saturday = Two days gap.
Saturday to Wednesday = Three days gap.
Wednesday to Monday = Four days gap.
In the next term there must be five days and six days gap.
So, Next term would be Sunday, Sunday.
Complete the series 2816, ? , 176, 44, 11.
Logic: Next term = Previous term /4
2816 /4 = 704
704 /4 = 176.
176 /4 = 44.
44 /4 = 11.
Complete the series 113, 225, 449, ? , 1793
113
113 * 2 = 226 -1 = 225
225 * 2 = 450 -1 = 449
449 * 2 = 898 - 1 = 897
897 * 2 = 1794 -1 = 1793
Which of the following will come in place of the question mark (?) in the following sequence?
PRODUCTIVITY, RODUCTIVIT, ODUCTIVI, ?
PRODUCTIVITY = RODUCTIVIT.(Bold letters are removed.)
RODUCTIVIT = ODUCTIVI.
ODUCTIVI = DUCTIV.
Complete the series 6, 24, 60,120, 210, ?
First Number = 1 *2 *3 = 6
Second Number = 2*3*4 = 24
Third Number = 3*4*5 = 60
Fourth Number = 4*5*6 = 120
Fifth Number = 5*6*7 = 210
Sixth Number = 6*7*8 = 336.
Alternatively,
2*2*2-2=6
3*3*3-3=24
4*4*4-4=60
5*5*5-5=120
6*6*6-6=210
7*7*7-7=336.
Complete the series 6, 11, 31, 121, 601, ?
First Term = 6.
Second term = 6*2 -1 = 11.
Third term = 11* 3 - 2 = 31.
Fourth term = 31 *4 - 3 = 124 -3 = 121.
Fifth term = 121*5 - 4 = 601.
Sixth term = 601 *6 = 3606 - 5 = 3601.