TCS Written Test Qs.(Quantitative Aptitude) :: Problems on Numbers - Discussion

Show Explanation

Please attempt the question to view the Explanation !!!

Explanation:
one digit no =4 (0 is not a positive integer)
two digit no=4*5=20
three digit no=4*5*5=100
four digit no=3*5*5*5=375(the possibility for 1,2,3 will come in the first position)four digit no=1*3*5*5(the possibility of 4is fixed in the first position and then 0,1,2 is comes in second position)and the last digit is 4300 we include this number also
4+20+100+375+75+1=575