Logic & Reasoning

Look at this series: 3, 4, 7, 8, 11, 12, . . . What number should come next?

a. 7
b. 10
c. 14
d. 15
  1. d. This alternating addition series begins with 3; then 1 is added to give 4; then 3 is added to give 7; then 1 is added, and so on.

Test ID: 537
Source: 501 challenging logic & reasoning problems