Download Top 10 Difficult Questions for Grade 3 Mathematics

Top 10 Difficult Questions for Grade 3 Mathematics
Question Number: 1
Greg bought a box of 45 chocolates. He wants to divide them evenly among
him and his 4 friends. How many chocolates should each person receive?
A) Correct Answer
B)
C)
D)
9 chocolates
11 chocolates
4 chocolates
5 chocolates
Explanation:
There are 5 people in all. There are 45 items that need to be shared with 5 groups.
When you place 1 item at a time in each group the result is:
Group 1: | | | | | | | | |
Group 2: | | | | | | | | |
Group 3: | | | | | | | | |
Group 4: | | | | | | | | |
Group 5: | | | | | | | | |
Each group contains 9 items. This is equivalent to 45 ÷ 5 = 9.
3.OA.2
Question Number: 2
Which of these figures is not a quadrilateral?
A)
B) Correct Answer
C)
D)
A square
A pentagon
A trapezoid
A parallelogram
Explanation:
A quadrilateral is a polygon with exactly 4 sides. Squares, parallelograms, and
trapezoids have four sides. A pentagon has 5 sides, meaning it is not a quadrilateral.
3.G.1
Question Number: 3
Which of these is a reasonable mass of a large dog?
A)
B)
C) Correct Answer
D)
9 grams
90 grams
29 kilograms
290 kilograms
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Explanation:
Of these four choices, 29 kilograms is the most reasonable value for the mass of a
large dog.
3.MD.2
Question Number: 4
Which of these expressions has a difference greater than 50?
A)
B)
C)
D) Correct Answer
279-229
291-244
376-333
300-248
Explanation:
After evaluating each subtraction expression, the fourth choice (300 - 248) is the only
expression that evaluates to a number greater than 50. (300 - 248 = 52)
3.NBT.2
Question Number: 5
A rectangular bulletin board is 12 feet long and 4 feet tall. The teacher wants to put a
border around the entire board. How long must the border be?
A)
B)
C) Correct Answer
D)
16 feet
48 feet
32 feet
36 feet
Explanation:
The border will go around the perimeter of the bulletin board. The perimeter of a
rectangle can be found by adding the lengths of the four sides. This rectangular board has
a perimeter of 32 feet (12 + 4 + 12 + 4 = 32).
3.MD.8
Question Number: 6
The Ridge Elementary School wants to raise $900 to pay for new gym equipment. The
students raised $225 last week and $278 this week. How much more money do they
need to raise to reach their goal?
A)
B)
C) Correct Answer
D)
$497
$403
$397
$503
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Explanation:
This is a two-step problem. First the total raised for the two-week period must be
calculated. $225 + 278 = $503. To find how much more money must be raised, $503
must be subtracted from $900. $900 - 503 = $397. The students must raise $397 more.
3.OA.8
Question Number: 7
Which of the following products is odd?
A)
B)
C)
D) Correct Answer
4x5x4
6x6x0
7x7x8
3x9x5
Explanation:
A product is odd only if all of the factors being multiplied are odd. Therefore, 3 x 9 x 5 will
have an odd product.
3.OA.9
Question Number: 8
Andrew has 20 video games. He has twice as many as Rachel does. How many video
games does Rachel have?
Which number sentence could be used to solve this problem?
A)
B)
C) Correct Answer
D)
20 x 2 = n
n x 20 = 2
n x 2 = 20
2 = 20 x n
Explanation:
"Twice as many" means to multiply by 2 so Andrews amount of 20 is equivalent to
Rachels' amount times 2 or n x 2 = 20.
3.OA.3
Question Number: 9
Use the Distributive Property to rewrite the following expression:
8 x 19
A)
B)
C) Correct Answer
D)
(8 x 10) + (9 x 10)
(8 x 20) - (19 x 8)
(8 x 20) - (8 x 1)
(19 x 8) x 1
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Explanation:
The Distributive Property states that when multiplying the sum or difference by a number
it is equivalent to multiplying each number in the sum or difference by the number and
then adding or subtracting the products. So 8 x 19 = 152 which is the same as (8 x 20) - (8 x
1) = 152.
3.OA.5
Question Number: 10
Find the product of 90 and 3.
A)
B) Correct Answer
C)
D)
120
270
360
390
Explanation:
To perform this multiplication, 90 can be viewed as 9 tens. 3 times 9 tens would be 27
tens, or 270.
3.NBT.3
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