Algorithms and Flowcharts CBSE Class 10 Computer Science Worksheets Set 01

Flowchart Questions with Answers

Question 1. Draw a flowchart to input a number and print its square and cube.

Answer:
The flowchart reads N, finds S = N × N and C = N × N × N in one process box and prints both values. Example: for N = 3 it prints 9 and 27.
In simple words: Input, process, output: the simplest flowchart pattern.

Teacher's Note:
1. Use a parallelogram for input and output and a rectangle for calculation.
2. Start and Stop go in rounded boxes.

Question 2. Draw a flowchart to find the area of a rectangle whose length and breadth are given.

Answer:
Read the length L and breadth B, compute Area = L × B and print it. Example: L = 8 and B = 5 give Area = 40.
In simple words: Read two values, multiply, print.

Teacher's Note:
1. Name the variables clearly.
2. The formula goes in the process box.

Question 3. Draw a flowchart to find (print) all the odd numbers up to 100.

Answer:
Set N = 1. While N ≤ 100, print N and add 2 to it; when N becomes 101 the decision answers No and the process stops.
Output: 1, 3, 5, ..., 99.
In simple words: Start at 1 and keep adding 2 inside a loop.

Teacher's Note:
1. A diamond decides whether to continue the loop.
2. The arrow returning to the diamond makes the loop.

Question 4. Draw a flowchart to accept the names and ages of two persons and print the name of the younger person.

Answer:
Read both names and ages. If Age1 < Age2 print Name1, otherwise print Name2.
If the two ages are equal, neither is younger; the chart then prints Name2, and a further decision could be added to print a message for equal ages.
In simple words: Compare the two ages and print the name with the smaller age.

Teacher's Note:
1. A decision box has two exits, Yes and No.
2. Both branches meet again at Stop.

Question 5. Draw a flowchart to find the average of 50 given numbers.

Answer:
Set Sum = 0 and I = 1. Repeat 50 times: input X, add it to Sum and increase I by 1. When I exceeds 50, compute Average = Sum / 50 and print it.
In simple words: Add the 50 numbers one by one and divide the total by 50.

Teacher's Note:
1. A counter I controls how many times the loop runs.
2. Start the sum at 0 before the loop.