GATE CSE 2018 | Question: GA-5

Question

$\text{ What is the missing number in the following sequence?}$

$$2,\,12,\,60,\,240,\,720,\,1440,\,\underline{\;\;\;\;\;\;\;\;},0$$

• A. $2880$
• B. $1440$
• C. $720$
• D. $0$

Comments

1440

Answer 1

$2 \times 6 = 12$
$12 \times 5 = 60$
$60 \times 4= 240$
$240 \times 3 = 720$
$720 \times 2 = 1440$
$1440 \times 1 = 1440$

So, option B, 1440 is the next term.

Answer 2

So, the missing number is 1440.

Answer 3

Answer: (B)

Multiply previous term by 6 ( 2 * 6= 12)

then by 5 , 4 ,3, 2 , 2 and 0 to get successive terms in sequence.

12 * 5  = 60

60 * 4 =210

240 * 3 = 720

720 *2 = 1440

 1440 *1 = 1440

1440 * 0 = 0

Answer 4

2*6=12 

12*5=60

60*4=240

240*3=720

720*2=1440

1440*1=1440 -- Ans = 1440

1440*0=0

Comments

Yes 1440