Latest TCS Aptitude Question SOLUTION: Q)These are called falling numbers in which digits of number gradually decreases. The largest falling number is 9876543210 where as ''0" is the smallest. How many such 5 digit numb

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Q)These are called falling numbers in which digits of number gradually decreases. The largest falling number is 9876543210 where as ''0" is the smallest. How many such 5 digit numbers could be possible????

Asked In TCS aneesh (8 years ago)

Unsolved Read Solution (13)

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vinoth  (8 years ago)

The possible 5 digit numbers are 98765,87654,76543,65432,54321,43210,97531,86420.
Therefore Ans:8

Is this solution Helpfull? Yes (15) | No (10)  

sundar  (8 years ago)

for 1st digit it may be 9,8,7,6,5,4 so 6 ways is possible,for 2nd digit 8,7,6,5,4,3 6 ways is possible in this way the number of ways possible is=6*6*6*6*6

Is this solution Helpfull? Yes (8) | No (9)  

Pritam Dutta  (7 years ago)

the answer is 21
because, there are 5 spaces, now if we fixed the fast place with 9 then numbers will be
98765
97654
96543
95432
94321
93210
that means 6,
with 8 at the 1st place we can create 5 numbers and
with 7 at the 1st place we can create 4 numbers and
with 6 at the 1st place we can create 3 numbers and
with 5 at the 1st place we can create 2 numbers and
with 4 at the 1st place we can create 51 number
so the total numbers will be 21

Is this solution Helpfull? Yes (6) | No (2)  

selvarasi  (7 years ago)

9!*8!*7!*6! becoz last number is 0 so we hyave this term of possiblility

Is this solution Helpfull? Yes (3) | No (3)  

Abhishek Das  (7 years ago)

There are 6 possibe ways. The first place can be 9,8,7,6,5,4 but the second plac can be only one way if the first digit is set. For example If first digit is 9 then the second will have to be 8 and the third will have to be 7 and the fourth will have to be 6 and the fifth will have to be 5. Similarly we can do with 8 or 7 or 6 or 5 or 4 in first place .

Is this solution Helpfull? Yes (2) | No (4)  

Jose Pavithra  (7 years ago)

Ans is 6!*5!*4!*3!

Is this solution Helpfull? Yes (2) | No (6)  

nishant mishra  (7 years ago)

30240
beacuse 10*9*8*7*6=30240

Is this solution Helpfull? Yes (2) | No (5)  

Anshi Gupta  (7 years ago)

The possible 5 digit numbers are 98765,87654,76543,65432,54321,43210,97531,86420.
Therefore Ans:8

Is this solution Helpfull? Yes | No (4)  

Debapriya Mallick  (7 years ago)

Keeping 9 at first place we get 6 types...hence for 8 at first place we get 5 types..
hence we will get 4,3,2,1 types...
so total no of ways will be...6+5+4+3+2+1=21 possible ways......... :)

Is this solution Helpfull? Yes | No (3)  

SURAJ BALANI  (7 years ago)

Its 21 or 8 please reply!!

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kalyani  (7 years ago)

ans : 8 gradually decrease and arrange the numbers then we have 98765,97531,87654,86420,76543,65432,54321,43210 only.

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Madhuri Mahato  (7 years ago)

M1*D1*T1*W2=M2*D2*T2*W1, here M=no.of men, D=no. of days, T=time, W=no. of work
x*x*x*W2=y*y*y*x
W2=y*y*y*x/(x*x*x)
W2=y*y*y/(x*x)

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prakash kasera  (6 years ago)

8 to pura galat hai

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