solution by Soumil-Bhattacharya

go.mod

@@ -0,0 +1,3 @@
+module gophercises/quiz
+
+go 1.21.6

students/Soumil-Bhattacharya/main.go

@@ -0,0 +1,105 @@
+package main
+
+import (
+	"encoding/csv"
+	"flag"
+	"fmt"
+	"math/rand"
+	"os"
+	"strings"
+	"time"
+)
+
+type problem struct {
+	q string
+	a string
+}
+
+// Fisher-Yates shuffle algorithm
+func Shuffle(data []problem) {
+	random := rand.New(rand.NewSource(time.Now().UnixNano()))
+	for i := 0; i < len(data); i++ {
+		r := random.Intn(i + 1)
+		data[i], data[r] = data[r], data[i]
+	}
+}
+
+func exit(msg string) {
+	fmt.Println(msg)
+	os.Exit(1)
+}
+
+func parseLines(lines [][]string) []problem {
+	res := make([]problem, len(lines))
+
+	for i, line := range lines {
+		res[i] = problem{
+			q: line[0],
+			a: strings.TrimSpace(line[1]),
+		}
+	}
+
+	return res
+}
+
+func main() {
+	csvFileName := flag.String(
+		"csv",
+		"problems.csv",
+		"a csv file in the format of 'question, answer'",
+	)
+	timeLimit := flag.Int("limit", 30, "the time limit for the quiz in seconds")
+
+	shuffle := flag.Bool("shuffle", false, "shuffle order of the questions")
+	flag.Parse()
+
+	file, err := os.Open(*csvFileName)
+	if err != nil {
+		exit(fmt.Sprintf("Failed to open the CSV file: %s\n", *csvFileName))
+	}
+
+	r := csv.NewReader(file)
+
+	lines, err := r.ReadAll()
+	if err != nil {
+		exit("Failed to parse the CSV file.")
+	}
+	problems := parseLines(lines)
+
+	if *shuffle {
+		Shuffle(problems)
+	}
+
+	timer := time.NewTimer(time.Duration(*timeLimit) * time.Second)
+
+	correct := 0
+problemLoop:
+	for index, problem := range problems {
+
+		fmt.Printf("Problem #%d: %s = ", index+1, problem.q)
+		answerCh := make(chan string)
+
+		go func() {
+			var answer string
+			fmt.Scanf("%s\n", &answer)
+			answer = strings.TrimSpace(answer)
+			answer = strings.ToUpper(answer)
+			answerCh <- answer
+		}()
+		select {
+		case <-timer.C:
+			fmt.Println()
+			break problemLoop
+		case answer := <-answerCh:
+
+			if problem.a == answer {
+				correct++
+			}
+
+		}
+
+	}
+	// <-timer.C
+
+	fmt.Printf("\nYou scored %d out of %d", correct, len(problems))
+}

students/Soumil-Bhattacharya/problems.csv

@@ -0,0 +1,12 @@
+5+5,10
+1+1,2
+8+3,11
+1+2,3
+8+6,14
+3+1,4
+1+4,5
+5+1,6
+2+3,5
+3+3,6
+2+4,6
+5+2,7