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Class 5 / Mental Maths (76 questions)
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by SHLOK
· Class 5
What is 3.27 + 7443.74?
Mental Maths
Fractions and Decimals
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people 2 answers
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by SHLOK
· Class 5
What is 755 × 2?
Mental Maths
Playing with Numbers
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people 2 answers
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by SHLOK
· Class 5
What is 3³ (3 cubed)?
Mental Maths
Other
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people 1 answers
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by SHLOK
· Class 5
What is 498 + 457?
Mental Maths
Other
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people 3 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
If two numbers are 14 and 28, what is their HCF?
Mental Maths
Integers
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people 6 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
How many numbers ≤ 1000 have exactly 3 factors?
Mental Maths
Knowing Our Numbers
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people 1 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
How many numbers ≤ 500 have exactly 3 factors?
Mental Maths
Integers
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people 1 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
Smallest number leaving remainder 2 when divided by 3, 4, 5, and 6
Mental Maths
Knowing Our Numbers
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people 0 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
If a number is divisible by both 8 and 12, it must be divisible by:
Mental Maths
Knowing Our Numbers
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people 3 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
How many numbers ≤ 200 are divisible by exactly one of 2 or 3?
Mental Maths
Integers
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people 1 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
If the HCF of two numbers is 7, which of the following must be true?
Mental Maths
Knowing Our Numbers
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people 0 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
Find the smallest number which leaves a remainder of 1 when divided by 2, 3, 4 and 5.
Mental Maths
Integers
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people 0 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
A leaky faucet wastes 20% of a 50-litre bucket every hour. How many litres of water are wasted in one hour?
Mental Maths
Comparing Quantities
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people 1 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
A school's water pump used to cost ₹2,000 to run. After switching to solar power, the cost decreased by 1/4 (one-fourth). What is the new cost to run the pump?
Mental Maths
Comparing Quantities
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people 1 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
If 4 water purification tablets can clean 20 litres of water, how many tablets are needed for 45 litres?
Mental Maths
Comparing Quantities
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people 0 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
In a small village of 400 people, 85% have access to clean sanitation. How many people still need better sanitation facilities?
Mental Maths
Comparing Quantities
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people 2 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
If the perimeter of a square is equal to the perimeter of a rectangle with length 10 cm and breadth 6 cm, find the side of the square.
Mental Maths
Mensuration
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people 2 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
A rectangular sheet of paper (12 cm x 10 cm) has a square of side 3 cm cut out from one corner. What is the area of the remaining sheet?
Mental Maths
Mensuration
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people 2 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
How many cubes of side 2 cm can fit inside a rectangular box measuring 10 cm x 8 cm x 6 cm?
Mental Maths
Mensuration
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people 0 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
The area of a rectangle is 48 sq. cm and its breadth is 6 cm. Find the perimeter of this rectangle.
Mental Maths
Mensuration
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people 0 answers
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Frequently Asked Questions
What are the Class 5 Mental Maths questions on CREST Ask & Answer?
Multiple-choice questions that CREST students write for other Class 5 students, on topics such as Knowing Our Numbers, Integers, Fractions and Decimals. Anyone can answer them free; the student who wrote the question adds the correct option and an explanation.
How do Practice Points work?
Logged-in students earn +1 for answering a question, +3 for asking one, +1 each time someone answers their question and +1 for each upvote; they lose 1 for each downvote. The first five questions on a topic in a class earn a +5 Pioneer bonus. One point is worth a ₹1 discount on Additional Practice purchases. See the rules for asking and answering.
How else can I prepare for the Class 5 CMMO exam?
Student questions are good daily practice, but they are not an exam paper. For the real exam pattern, try the Class 5 sample paper and the Class 5 previous year paper, and check the CMMO syllabus.
What happens to a wrong or copied question?
Any logged-in student can press Report on a question. Questions that break the rules, such as wrong answers, copied pictures or keyboard mashing, are taken off and the points they earned are taken back.