CAT / #Quantitative Ability

May 15, 2018

May 15, 2018 @ 02:35 PM

MICA

Quantitative Ability - Odd Man Out and Series

QA

CAT 2018 is being conducted on 25th November 2018. Practice with following Odd Man Out and Series Questions with solutions:

 
Quantitative Ability - Odd Man Out and Series
 

Directions to Solve
Find out the wrong number in the series:

Question 1)
190, 166, 145, 128, 112, 100, 91

A) 100

B) 166

C) 145

D) 128

E) 112

Answer - Option D

Solution:
Go on subtracting 24, 21, 18, 15, 12, 9 from the numbers to get the next number.
190 - 24 = 166
166 - 21 = 145
145 - 18 = 127 [Here, 128 is placed instead of 127]
127 - 15 = 112
112 - 12 = 100... and son on.
Therefore, 128 is wrong


Question 2) 

1, 3, 10, 21, 64, 129, 356, 777

A) 10

B) 21

C) 64

D) 129

E) 356

Answer - Option E

Solution:

A x 2 + 1, B x 3 + 1, C x 2 + 1, D x 3 + 1  and son on. So, 356 is wrong.

Question 3)

6, 12, 48, 100, 384, 768, 3072

A) 768

B) 384

C) 100

D) 48

E) 12

Answer - Option C

Solution:

Each even term of the series is obtained by multiplying the previous term by 2.
2nd term = (1st term) x 2 = 6 x 2 = 12

4th term = (3rd term) x 2 = 48 x 2 = 96

6th term = (5th term) x 2 = 384 x 2 = 768

Therefore, 4th term should be 96 instead of 100

Question 4)

40960, 2560, 640, 200, 40, 10

A) 640

B) 40

C) 200

D) 2560

E) 10240

Answer: Option C

Solution:

Go on diving by 4 to get the next number. So, 200 is wrong.

Question 5)

10, 26, 74, 218, 654, 1946, 5834

A) 26

B) 74

C) 218

D) 654

E) 1946

Answer: option D

Solution:

2nd term = (1st term) * 3-4 = 10*3-4 = 26.

3rd term = (2nd term) * 3-4 = 26*3-4 = 74.

4th term = (3rd term) * 3-4 = 74*3-4 = 218.

5th term = (4th term) * 3-4 = 218*3-4 = 650.

Thus, 5th term must be 650 instead of 654

Question 6)

15, 16, 34, 105, 424, 2124, 12576

A) 16

B) 34

C) 105

D) 424

E) 2124

Answer:  Option E

Solution:

2nd term = (1st term) * 1+1 = 15*1+1 = 16.

3rd term = (2nd term) * 2+2 = 16*2+2 = 34.

4th term = (3rd term) * 3+3 = 34*3+3 = 105.

5th term = (4th term) * 4+4 =105*4+4 = 424.

6th term = (5th term) * 5+5 = 424*5+ 5 = 2125

Therefore, 6th term should 2125 instead of 2124

Attempt QA Mock Questions

Practise with Mock Tests on CAT Exam

Study Complete Module on QA

Stay informed, Stay ahead and stay inspired with MBA Rendezvous

Crucial Dates, You Should not Miss

IMI New Delhi
Admissions open for PGDM / PGDM(HRM) / PGDM(B&FS) at IMI New Delhi. Last date to apply is Dec 3rd, 2018.
Birla Institute of Management Technology (BIMTECH)
BIMTECH Admissions Open for 2019.
XIMB, XUB
XIMB, XUB Admissions Open for 2019 at Xavier Institute of Management. Last date to apply December 7th, 2018.
MDI Gurgaon
Admissions Open for PGPM | PGPM-HRM | PGP-IM 2019 at MDI Gurgaon. Last date to apply November 23th, 2018
MICA
Admissions open for PGDM-C 2019-2021.
Goa Institute of Management
Admissions open for 2019-2021 at GIM. Last date to apply is November 30th, 2018
SDMIMD
Admissions open for PGDM 2019-2021 at SDMIMD.
IMT Ghaziabad
Admissions open for 2 Year PGDM and MBA programs at IMT Ghaziabad- Application Deadline is November 22nd, 2018
ICFAI Business School
ICFAI Business School Accepting Applications for IBSAT 2018
Lal Bahadur Shastri Institute of Management (LBSIM)
Admissions open for 2019 at LBSIM, New Delhi. Last date for applying Dec 15th, 2018
TAPMI
Experience@TAPMI Admissions Open for 2019
MDI Murshidabad
Admissions Open for PGP 2019-21 at MDI Murshidabad
SIBM, Bengaluru
Admissions Open for MBA 2019-21 at SIBM, Bengaluru
XLRI
XAT 2019 Registration, Application Ends on November 30th, 2018. Exam Date January 6th, 2019