wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The sum of all even natural numbers between 1 and 31 is:

A
16
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
128
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
240
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
512
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 240
Required sum =(2+4+6+......+30)
This is an A.P in which a=2,d=(42)=2 and l=30.
Let the number of terms be n. Then,
tn=30 a+(n1)d=30
2+(n1)×2=30
n1=14
n=15
Sn=n2(a+l)=152×(2+30)=240

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Arithmetic Progression
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon