Basketball Rules Trivia
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58 free Basketball Rules trivia questions with answers — sports quiz, new questions added Aug 2026.
57 free Basketball rules trivia questions with answers. Basketball rules trivia for referees, coaches, league nights and anyone who has argued about a call. This quiz covers the rulebook from top to bottom: how the 24-second shot clock was calculated, why goaltending was outlawed, how many fouls send you to the bench, where the three-point line sits in the NBA, FIBA and college, and what happens when a player kicks the ball or shatters a backboard. It also digs into the differences between the NBA, FIBA and NCAA rulebooks: quarter lengths, timeouts, the possession arrow, the bonus and the one-and-one. And it goes back to the beginning, with the peach baskets, the soccer ball and the original rule that banned running with the ball. Questions run from easy to expert, each labelled by difficulty. Every answer has been checked against Wikipedia and the official rulebooks it cites.
30 of 58 questions with answers and explanations. Play the quiz
Q 01How many players from each team are allowed on the court at one time?
Five
Substitutions are unlimited, but they can only be made while play is stopped.
Q 02How high above the floor is the rim of a regulation basket?
10 feet
The rim is 10 feet above the floor, the height of the running-track balcony railing where James Naismith hung his first goals in 1891; the game has never moved it.
Q 03How many seconds does an NBA team have to attempt a shot after gaining possession?
24
The NBA shot clock gives a team 24 seconds to get a shot off; it was introduced for the 1954-55 season to end the deliberate stalling that had made games crawl.
Q 04Which team owner is credited with inventing the NBA shot clock?
Danny Biasone
Danny Biasone, owner of the Syracuse Nationals, pushed the league to adopt the shot clock for the 1954-55 season after stalling tactics had made games unwatchable.
Q 05Under NBA and FIBA rules, to what does the shot clock reset after an offensive rebound?
14
The shot clock resets to 14 seconds after an offensive rebound; FIBA adopted the rule in 2014 and the NBA followed in 2018-19, so a putback no longer earns a full fresh possession.
Q 06How long did the shot clock become in NCAA men's basketball in 2015-16?
30
College started with 45 seconds in 1985-86, cut it to 35 in 1993-94, and to 30 in 2015-16.
Q 07How long is each quarter in an NBA game?
12
Each NBA quarter lasts 12 minutes, giving a 48-minute regulation game; FIBA plays 10-minute quarters and NCAA men play two 20-minute halves.
Q 08How many personals disqualify a player from an NBA game?
Six
Six personal fouls disqualify an NBA player; when the sixth is called he must leave the game for good and a substitute replaces him.
Q 09How wide is the free-throw lane on an NBA court?
16 feet
The NBA lane is 16 feet wide; it was widened in stages during the 1950s and 1960s to push dominant centers farther from the basket, and FIBA's lane is a near-identical 4.9 metres.
Q 10How far is the NBA three-point arc from the center of the basket at its farthest point?
23 feet 9 inches
The NBA arc is 23 feet 9 inches from the basket's center at the top of the key and flattens toward the corners, where the sideline forces a shorter line, which is why corner threes are prized.
Q 11Which short-lived competition, founded in 1961, was the first to institute the three-point shot?
The ABL
The ABL, Abe Saperstein's league, played with a three-point line from its 1961-62 debut and folded during its second season; the ABA revived the shot in 1967-68.
Q 12In which season did the NBA adopt the three-point line?
1979-80
The NBA adopted the three-point line for the 1979-80 season, initially as a one-year trial, years after the ABA had made the shot its signature; Chris Ford is credited with the first NBA three.
Q 13For three seasons starting in 1994-95, the NBA shortened its three-point line to what uniform distance?
22 feet
The NBA moved its whole arc in to a uniform 22 feet from 1994-95 through 1996-97 to boost scoring, then restored the original distance in 1997-98.
Q 21How far is the free-throw line from the backboard?
15 feet
The free-throw line is 15 feet from the face of the backboard; the shooter must keep both feet behind it until the ball leaves the hands, or the attempt is waved off.
Q 22In the NBA, which team puts the ball in play to start the fourth quarter?
The team that won the opening tip
The team that won the opening tip inbounds to begin the fourth quarter, while the team that lost it opens the second and third, so each side starts two periods with possession.
Q 23What is the radius of the restricted-area arc under the basket, where no charge can be drawn?
4 feet
Q 14How far is the FIBA three-point arc from the center of the basket?
6.75 m
FIBA's arc is 6.75 m from the basket's center, a distance adopted in 2010 that replaced the old 6.25 m line; the WNBA moved to the same distance in 2013.
Q 15Under NBA and FIBA rules, how many steps may a player take without dribbling before it is traveling?
Two
Moving or changing the pivot foot also counts as traveling, and the penalty is a turnover.
Q 16What is the penalty for goaltending a field-goal attempt?
The shot counts as made
The shot counts as made when goaltending is called and the points are awarded; a defender may not touch a shot on its downward flight to the rim or while it is above the cylinder.
Q 17Which dominant center prompted the NCAA to outlaw goaltending in 1944?
George Mikan
George Mikan, DePaul's 6-foot-10 center, swatted so many shots away at the rim that the NCAA outlawed goaltending for the 1944-45 season.
Q 18Which foul is called when a driver runs into a defender who is not set?
Blocking
Blocking is the defensive foul called when a defender who has not established legal guarding position makes contact with a driving opponent; had he been set, the call would go against the driver.
Q 19How many free throws does a technical foul award the opposing team in the NBA and FIBA?
One
One free throw is awarded for a technical foul in the NBA and in FIBA play, taken by any player the offended team chooses, after which play resumes from the point of interruption.
Q 20How many free throws does a player get when fouled while missing a shot from beyond the arc?
Three
If the shot goes in despite the foul, the basket counts and the shooter gets one bonus attempt instead: the classic and-one.
The restricted area is a semicircle with a radius of 4 feet, measured from the point directly below the basket's center; a defender standing inside it cannot draw a charge on a drive.
Q 24What are the dimensions of an NBA court?
94 by 50 feet
An NBA court measures 94 by 50 feet, the same dimensions the NCAA uses; FIBA courts are slightly smaller, at roughly 92 by 49 feet.
Q 25What is the diameter of a regulation basketball rim?
18 inches
A regulation rim is 18 inches in inside diameter, nearly double the width of the ball; NBA rims sit on breakaway hinges so dunks do not shatter the board.
Q 26What is the circumference of the official men's basketball?
29.5 inches
The official men's basketball, designated size 7, measures 29.5 inches in circumference, the size used in the NBA, NCAA men's play and FIBA senior men's competition.
Q 27Which company has supplied the NBA's official game ball since 2021, as it did from 1946 to 1983?
Wilson
Wilson made the league's first ball in 1946 and returned as official supplier for the 2021-22 season; Spalding held the contract for the 38 seasons in between.
Q 28Under NBA and FIBA rules, how many seconds does a team have to advance the ball past half court?
8
A team has 8 seconds to get the ball across half court under NBA and FIBA rules; FIBA cut the old ten-second limit in 2000 and the NBA followed for 2001-02.
Q 29In what year was the offensive three-second rule introduced?
1936
The three-second rule arrived in 1936 after a rough 1935 Kentucky-NYU game at Madison Square Garden in which NYU's physical defense smothered Kentucky star Leroy Edwards.
Q 30The NBA's defensive three-second violation was added in 2001-02 alongside which other change?
Legalizing zone defenses
Legalizing zone defenses for 2001-02 meant scrapping the illegal-defense rules, so the league added a defensive three-second count to stop a big man camping in the lane.