Averages
Find the mean of the first 10 odd integers.
10
Three is added to a number and the result is then multiplied by 5. The answer is 35, find the number.
4
In a class 60% of the students are girls. If the total number of students is 30, what is the number of boys?
12
Find the circumference and area of radius 7 cm.
44 cm and 154 cm2
Out of 300 students in a school, 95 play cricket only, 120 play football only, 80 play volleyball only and 5 play no games. If one student is chosen at random, find the probability that he plays volleyball.
4/15
Find the mean of first 5 prime numbers.
5.6
The sum of two numbers is 25. One of the numbers exceeds the other by 9. Find the numbers.
8 and 17
Mason was able to sell 35% of his vegetables before noon. If Mason had 200 kg of vegetables in the morning, how many kg of vegetables was left after noon?
130 kg
The diameter of a wheel of cycle is 21 cm. It moves slowly along a road. How far will it go in 500 revolutions?
330 m
Out of 300 students in a school, 95 play cricket only, 120 play football only, 80 play volleyball only and 5 play no games. If one student is chosen at random, find the probability that he plays neither football nor volleyball.
1/3
The runs scored in a cricket match by 11 players is as follows:
7, 16, 121, 51, 101, 81, 1, 16, 9, 11, 16
Find the mean, mode, median of this data.
Mean = 39 1/11;
Mode = 16;
Median = 16
The length of a rectangle is twice its breadth. If the perimeter is 72 metre, find the length and breadth of the rectangle.
12 and 24
In a basket of apples, 12% of them are rotten and 66 are in good condition. Find the total number of apples in the basket.
75
Find the area of the circle if its circumference is 132 cm.
1386 cm2
A die is thrown once. What is the probability that the score is a factor of 6?
2/3
The following observations are arranged in ascending order. The mean of the data is 25 find the value of x.
17, x, 24, x + 7, 35, 36, 46
5
The difference between the two numbers is 48. The ratio of the two numbers is 7:3. What are the two numbers?
84 and 36
The cost of an article is decreased by 15%. If the original cost is $80, find the new cost.
$ 68
he area of a circle is 616 cm². Find its circumference.
88 cm
There are 10 counters in a bag: 3 are red, 2 are blue and 5 are green.
The contents of the bag are shaken before Maxine randomly chooses one counter from the bag.
What is the probability that she doesn't pick a red counter?
7/10
There are 12 students in Phil’s Maths group. The mean mark in a test is 76%. In Paul’s
group there are only eight students. Their mean mark is 84%.
Find the overall mean for the 20 children.
79.2%
If 3/5 ᵗʰ of a number is 4 more than 1/2 the number, then what is the number?
40
Kelly requires 36 % to pass. She gets 196 marks and falls short by 20 marks. Find the maximum numbers she could have got.
600
A piece of wire in the form of rectangle 40 cm long and 26 cm wide is again bent to form a circle. Find the radius of the circle.
21 cm
A bag contains 8 red balls and x white balls. If the probability of drawing a white ball is half of the probability of drawing a red ball then find the number of white balls in the bag.
4