How many natural numbers less than 10^8 are there,whose sum of digits equals to 7?
joín fastame-bwyk-kze
make the smallest and greatest four digit number with the following digit .1)5,6,4 and 3
1. Mr Gupta bought a house for 40000. What will it be worth in 2 years if it depreciates at 10% each year?
If x/2 = Y/3= z/4. Then x+y+z/3Y = ???
5. 4 tens +18 ones ones.
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Answers & Comments
the numbers have 8 place(some of which might be zero),And there are 7 units of value to go into them.(which place can have at most 9units,but that is automatic since their is only 7 units total.)so it's a star and bars problem which 7 star and 7 bar,making (14/7)=3432watch numbers..
(edited 8 not 7)....