Algorithms and flowcharts Quiz

1. Set $n=1$. While $n\le20$, replace $n$ by $2n$. Output $n$. What is the output?

• A. $16$
• B. $20$
• C. $32$
• D. $40$

2. Which flowchart shape is used for a yes/no decision?

• A. A diamond
• B. A rectangle
• C. An oval
• D. A parallelogram

3. An algorithm multiplies the input $n$ by $4$, then subtracts $6$. The output is $10$. What was the input?

• A. $1$
• B. $16$
• C. $2.5$
• D. $4$

4. A sequence starts at $5$ and adds $3$ each time. What is the $10$th term?

• A. $35$
• B. $32$
• C. $30$
• D. $38$

5. Set $x=2$. Add $3$ to $x$ and repeat while $x\le10$. Output $x$. What is the output?

• A. $11$
• B. $8$
• C. $10$
• D. $14$