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If the sum of three consecutive odd numbers is 249, the numbers are

A. 81,83,85

B. 79,81,83

C. 103,105,107

D. 95,97,99

In a school, the ratio of the number of children in lower primary classes to the number of children in the upper primary classes is 2 : 3; and the ratio of the number of children in the upper primary to the number of children in the secondary classes is 4 : 5. What is ratio of the number of children in lower primary to the number of children in the secondary?

In a factory 70% of the workers like oranges and 64% likes apples. If each worker likes at least one fruit, the minimum percentage of workers who like both the fruits is ___ %

When do you say two angles are adjacent?

Question 122

Work out the surface area of the following shape.

Write the following in decreasing order

85, 210, −58, 2011, −1024, 528, 364, −10000, 12

While reading newspaper, Ted caught news of a football match between Brazil and Spain. The countries were represented with their respective flags. In Brazil’s flag, the length of any side of parallogram is 10.6 cm and corresponding height is equal to 8.3 cm. If area of the green region is 74.02 $c{m}^2$ and length of the flag is twice the breadth, find the length of the flag.

Question 89

Solve the following:

Sum of the digits of a two-digit number is 11. The given number is less than the number obtained by interchanging the digits by 9. Find the number.

Ten years ago a father was four times as old as his son .After 20 years he will be twice as old as his son .Determine the present age of the son.

Question 107

Metallic discs of radius 0.75 cm and thickness 0.2 cm are melted to obtain 508.68 $c{m}^3$ of metal. Find the number of disc melted. (Use $\pi =3.14$)

Question 5

If m is the mid-point and l is the upper class limit of a class in a continuous frequency distribution, then the lower class limit of the class is:



A) 2m + I

B) 2m - l

C) M - l

D) M - 2I

Select the net for a triangular prism.

1. 12

Question 109

Solve the following question:

Find the least square number, which is exactly divisible by 3, 4, 5, 6 and 8.

In a college there are 10 periods per day each of 40 minutes. The students were protesting to reduce the number of periods but the Principal did not want to reduce the working hours. What should be the working hours of each period if Principal reduces the number of periods to 8?

The following cumulative frequency curves are less than type ______.

If the side of the square is $7\text{cm}$, what will be the length of its diagonal?

Question 87(i)

Classify the following statements under appropriate headings.

Getting the sum angles of a triangle as ${180}^{\circ }$.

$\begin{array}{ccc}\text{Certain to happen}& \text{Impossible to happen}& \text{May or may not happen}\\ & & \\ & & \end{array}$

1. 3

Without using the formula, find the difference between compound interest and the simple interest on ₹ 16,000 at 9% per annum in 2 years.

The total surface area of a cylinder of radius 'r' and height 'h' is _____.

Find the next term in the following series:
$0,1,1,2,3,5,8,13,$ __

For a quadrilateral PQRS where PQ = 4 cm,QR = 6 cm, RS = 5 cm, PS = 5.5 cm. The length of PR should be less than

In a class, the teacher asks the students to name a few scientists. Following were the names that came up - Einstein, Newton, Einstein, Faraday, Tesla, Hawking, Einstein, Tesla, Tesla, Faraday, Einstein. Who is the most famous scientist?

The value of the variable x which satisfies the equation
5(2x - 1) - 4x = 2(5x + 2) also satisfies the equation ______.

Question 41

In the experiment of tossing a coin one time, the outcome is either ___ or ___.

Find the angle x in the given figure.

[2 MARKS]

Solve the following equations and verify your answer :
$\frac{15(2-x)-5(x+6)}{1-3x}=10$

Question 12

Cost of a dozen pens is Rs 180 and cost of 8 ball pens is Rs 56. Find the ratio of the cost of a pen to the cost of a ball pen.