If the rule is 'double then subtract 1' starting from 4, what is the second term?

If the rule is 'double then subtract 1' starting from 4, what is the second term?

• A. 9
• B. 11
• C. 13
• D. 7

Answer: (D)

The rule tells you how to obtain the next term from the current one: double the current number, then subtract 1. Start with 4 as the first term. Double 4 to get 8, then subtract 1 to get 7. That 7 is the second term. (For reference, applying the rule again to 7 would give 13, which would be the third term.)

The rule tells you how to obtain the next term from the current one: double the current number, then subtract 1. Start with 4 as the first term. Double 4 to get 8, then subtract 1 to get 7. That 7 is the second term. (For reference, applying the rule again to 7 would give 13, which would be the third term.)