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- What will come in place of the question mark (?) in the following number series? 5, 7, ?, 25, 45, 75
Question 1:
What will come in place of the question mark (?) in the following number series?5, 7, ?, 25, 45, 75
A. 11
B. 13
Feedback The series given follow the pattern
+2, +2+4, +2+4+6, +2+4+6+8, +2+4+6+8+10,...
Here ? = 7 + 2 + 4 = 13.
+2, +2+4, +2+4+6, +2+4+6+8, +2+4+6+8+10,...
Here ? = 7 + 2 + 4 = 13.
C. 15
D. 19
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