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

What should come in place of the question mark (?) in the following number series?
15, 12, 17, 10, ?, 8, 25, 6


A
3
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
7
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
21
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
19
No worries! We‘ve got your back. Try BYJU‘S free classes today!
E
None of these
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 21

15 - 3 = 12, 12 + 5 = 17, 17 - 7 = 10, 10 + 11 = 21, 21 - 13 = 8, 8 + 17 = 25, 25 - 19 = 6
Note that 3, 5, 7, 11, 13, 17 and 19 are consecutive prime numbers.


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