Numbers and numbers!!!
Probability
Level
2
Find the sum of all the natural numbers which are less than 250 and which are divisible by 7.
The answer is 4410.
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
The 1st term is 7 and the last term(and also the 35th) is 245. So let total sum of all natural number=number of terms/2(1st term+last term). sum of 35 terms=35/2(7+245)=4410