Look at this series: 21, 9, 21, 11, 21, 13, 21, … What number should come next?
A. 14
B. 15
C. 21
D. 23
Answer:B
Look at this series: 21, 9, 21, 11, 21, 13, 21, … What number should come next?
A. 14 B. 15 C. 21 D. 23