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All Grades / Mental Maths (215 questions)
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by ADWIT KUMAR
· Class 3
What is 0 ÷ 0 ?
Mental Maths
Multiplication and Division
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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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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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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 KRITARTH AGARWAL
· Class 4
What is 6³+12²+√144?
Mental Maths
Other
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people 4 answers
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by KRITARTH AGARWAL
· Class 4
What is 32×10÷2 ?
Mental Maths
Multiplication and Division
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people 4 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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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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by AKSHAY GURU VARADHARAJAN
· Class 5
A square park has a side of 10 m. If a wire is run around the boundary four times to fence it, what is the total length of the wire used?
Mental Maths
Mensuration
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people 2 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
If 1/2 of 3/4 of a number is 12, what is 1/4 of that number?
Mental Maths
Fractions and Decimals
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people 2 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
I am a decimal number. If you multiply me by 10, I am less than 50. If you add me to 0.75, the result is a whole number. Who am I?
Mental Maths
Fractions and Decimals
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by AKSHAY GURU VARADHARAJAN
· Class 5
A cake is divided into 12 equal slices. Rohan eats 1/4 of the cake. His sister eats 1/3 of the remaining cake. What fraction of the original cake is left?
Mental Maths
Fractions and Decimals
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people 2 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
Which of the following mathematical statements is TRUE?
Mental Maths
Fractions and Decimals
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people 3 answers
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by AKSHAY GURU VARADHARAJAN
· Class 5
In a sequence of numbers, each number is 0.25 more than the previous one. If the 3rd number in the sequence is 1.5, what is the sum of the 1st and 5th numbers?
Mental Maths
Fractions and Decimals
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by GIANSH GUPTA KHUNDKER
· Class 9
A man buys apples at 3 for a rupee and sells them at 2 for a rupee. Find his gain percent.
Mental Maths
Comparing Quantities
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by GIANSH GUPTA KHUNDKER
· Class 9
The simple interest on Rs. 5000 at 8% p.a. for 3 years is?
Mental Maths
Other
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by GIANSH GUPTA KHUNDKER
· Class 9
If 3 : x :: 9 : 15, find x.
Mental Maths
Comparing Quantities
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