how many odd and even numbers are there between 42 and 400 Find the sum of odd numbers and the

Total no. of numbers b/w 42 & 400=400-42+1=359.As the series is beginning with an even no. & ending with an even no. so number of even nos is more.So, there are (359+1)/2=180 even nos and rest 179 are odd nos.Now using the formula of sum of n terms in an AP[n/2(a+l)] we can can find the sum of the numbers.Sum of even terms is 39780 and that of odd terms is 39559.
11 years agoHelpfull: Yes(8) No(3)
Odd numbers are from 43 to 399.
Number of odd numbers = l−ad+1=399−(43*2)+1=179
Their sum = n2(l + a) = 39559

Even numbers are from 44 to 398.
Number of even numbers = l−ad+1=398−442+1=178
Their sum = 178^2*(398+44) =39338
10 years agoHelpfull: Yes(4) No(0)
sum of odd terms=9559
sum of even terms=39780
no of odd terms=79
no of even terms=180
11 years agoHelpfull: Yes(1) No(6)
sorry no of odd terms is 179
and sum of odd no is 39559
11 years agoHelpfull: Yes(1) No(0)
hey i think he askd in between but not including 42 and 400?
11 years agoHelpfull: Yes(1) No(0)
Sol: Odd numbers are from 43 to 399. Number of odd numbers = (l−a/d)+1=179
Their sum = n/2(l+a) = 39559

Even numbers are from 44 to 398. Number of even numbers = (l−a/d)+1=178
Their sum = 1782(398+44)=39338
here as the question says that number between 42 to 400 so we should take from 43 to 399 values..
10 years agoHelpfull: Yes(0) No(0)

how many odd and even numbers are there between 42 and 400??
Find the sum of odd numbers and the sum of even numbers!