Getting your questions ready
Getting your questions ready
Beat the crowd
10 questions No timer
60 free 4th Grade Math trivia questions with answers — science & nature quiz, new questions added Aug 2026.
These math trivia questions for 4th graders stick to what a nine- or ten-year-old actually meets in class: multi-digit multiplication and division, factors and multiples, prime and composite numbers, equivalent fractions and decimals, angles and shapes, perimeter and area, and converting units of time, length and weight. Every question is multiple choice, so it works read aloud in a classroom, at the kitchen table or as a quick warm-up before a test. The set is written for teachers building a Friday quiz, parents who want ten minutes of practice that does not feel like a worksheet, and kids who like getting things right. Difficulty is honest for the grade: most questions are gentle, a handful make you think. Each answer is backed by a citation to a maths reference or encyclopaedia entry, so the definitions and formulas match what the textbook says.
30 of 60 questions with answers and explanations. Play the quiz
Q 01Which of these numbers is a prime number?
7
Its only factors are 1 and itself; 4, 6 and 9 can each be made by multiplying two smaller numbers.
Q 02A number bigger than 1 that is NOT prime is called what?
Composite
Composite numbers such as 8, 9 and 12 can be split into two smaller whole-number factors.
Q 03What do we call the distance all the way around the outside of a shape?
Perimeter
You find it by adding up the lengths of every side.
Q 04A rectangle is 6 cm long and 4 cm wide. What is its area?
24 cm²
Area of a rectangle is length times width, so 6 × 4 = 24.
Q 05A rectangle is 5 m long and 3 m wide. How far is it all the way around the outside?
16 m
Add two lengths and two widths: 5 + 5 + 3 + 3 = 16.
Q 06In the fraction 3/4, what is the number on top called?
The numerator
The top number counts how many parts you have; the bottom number tells you how many equal parts make a whole.
Q 07Which fraction is greater than 1?
7/4
When the top number is bigger than the bottom one, the fraction is 'improper' and worth more than one whole.
Q 08How many degrees are in a right angle?
90
It is a quarter turn, the corner of a sheet of paper or a book.
Q 09An angle bigger than a right angle but smaller than a straight angle is called what?
Obtuse
Obtuse means 'blunt'; anything smaller than 90 degrees is acute, meaning 'sharp'.
Q 10How many degrees make a full turn all the way around a point?
360
That is why a compass and a protractor's circle are split into 360 little steps.
Q 11An angle that makes a perfectly straight line measures how many degrees?
180
Half of a full turn is a straight angle.
Q 12What do the three angles inside any triangle always add up to?
180°
That is also why a triangle can never have two right angles or two blunt, wide-open angles.
Q 13A triangle with three sides all the same length is called what?
Equilateral
All three of its angles are equal too, at 60 degrees each.
Q 14A triangle with exactly two sides the same length is called what?
Q 21If a circle's radius is 5 cm, how wide is it all the way across through the middle?
10 cm
The diameter goes right across the circle through the middle, so it is two radii end to end.
Q 22Two lines that stay the same distance apart and never cross are called what?
Parallel
Railway tracks and the opposite sides of a rectangle are everyday examples.
Q 23Two lines that cross to make right angles are called what?
Perpendicular
The corner of a book, a plus sign and the letter T all show it.
Q 24A straight path between two endpoints that stops at both ends is called what?
Isosceles
The two angles opposite the equal sides are equal as well.
Q 15How many sides does a quadrilateral have?
4
Squares, rectangles, rhombuses and trapezoids are all quadrilaterals.
Q 16How many sides does a hexagon have?
6
Honeycomb cells and many nuts and bolts are hexagons.
Q 17How many sides does an octagon have?
8
A stop sign is the octagon most kids see every day.
Q 18A five-sided shape is called what?
A pentagon
The famous US military headquarters near Washington is named for its five-sided shape.
Q 19A closed flat shape made only of straight line segments is called what?
A polygon
Triangles, squares and hexagons all count; a circle does not, because it has no straight sides.
Q 20The distance from the centre of a circle to its edge is called what?
The radius
Go all the way across through the centre and you have the diameter, which is twice as long.
A line segment
A ray has only one endpoint and goes on forever the other way; a full line has no endpoints at all.
Q 25If you can fold a shape so both halves match exactly, the fold is called what?
A line of symmetry
A capital letter A has one, a square has four, and a circle has endless lines of symmetry.
Q 26How many faces does a cube have?
6
All six faces are identical, like a dice; a cube also has 8 corners and 12 edges.
Q 27What is the answer to a multiplication problem called?
The product
Sum is for adding, difference for subtracting, and quotient for dividing.
Q 28In the problem 20 ÷ 4 = 5, which number is the quotient?
5
The 20 being divided is the dividend and the 4 is the divisor.
Q 29When you divide 17 by 5, what is the remainder?
2
5 goes into 17 three times (15), leaving 2 left over.
Q 30Which of these is a factor of 12?
6
12 = 2 × 6, so 6 divides evenly; the full list of factors of 12 is 1, 2, 3, 4, 6 and 12.