Latest Gate Aptitude Question SOLUTION: summation of five digit number made by the help of following number (1,3,5,7,9)repetition not allowed..

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(#M40032985) GATE Numerical Ability question 2014 paper Keep an EYE

summation of five digit number made by the help of following number (1,3,5,7,9)repetition not allowed..

Asked In Gate RAGHWENDRA KUMAR SINGH (10 years ago)

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dhyanendra mani tripathi  (10 years ago)

how many such no. will be there i.e 5*4*3*2*1=120
ex 13579
15379
this way we have to sum 120 no.
now at unit place we will have all the no. (120/5=24 ) times hence
(1+3+5+7+9)*24=600
hence unit place = 0 carry 60
next 600+60 => tens place =0 and carry 66
next 600+66 +> hundred place =6 carry 66
this way we got 6666600

Is this solution Helpfull? Yes (6) | No   

RAKESH  (10 years ago)

sum = 11111*(sum of digits)* 5!/5

= 11111*(1+3+5+7+9)* 24
= 11111* 25* 24
= 6666600

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