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Q:

# Find by how much percentage the average of first 10 odd numbers (starting from 1) is greater than the last term ?

 A) 991/16 % B) 900/19 % C) 874/13 % D) 719/17 %

Answer:   B) 900/19 %

Explanation:

First ten odd numbers form an arithmetic progression of the form
1,3,5,7,9......
here a = first term = 1
d = common difference = 2
Average of first n numbers = (2a + (n - 1)d)/2
n th term of the AP = a + (n - 1)d
Substituting a = 1, d = 2 and n = 10 in the above formulas
average of first 10 numbers = 10
10 th term of the AP = 19
Therefore average of first 10 terms is 19 - 10 = 9 greater than
the last term. Hence the average is greater than the sum by
9/19 X 100 = 900/19 %

Q:

What does it mean to calculate frequencies within a dataset?

 A) to calculate the product of two variables to make a third variable B) to count the number of cases that fall into different subgroups within a dataset C) to count the number of times a dataset is used by a student D) to calculate the sum of a column of variables in a dataset

Answer & Explanation Answer: B) to count the number of cases that fall into different subgroups within a dataset

Explanation:

Frequency is what means how many times the event occurs in the same period.

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0 61
Q:

Name a pair of complementary angles?

 A) B + C B) A + C C) C + C D) B + A

Answer & Explanation Answer: D) B + A

Explanation:

Complementary angles are those whose sum is 90.

Given here, is a right angled triangle, where anfle C is 90 deg. In this, sum of Angles A + C = 90, since, sum of angles in a right angled triangle = 180, angle C = 90 and

hence sum of A + B = 180 - C = 180 - 90 = 90.

Hence, the pair of cimplementary angles in the given triangle = Angle A + B.

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2 163
Q:

Two angles whose sum is 90 are

 A) Supplementary angles B) corresponding angles C) Complimentary angles D) Alternate angles

Answer & Explanation Answer: C) Complimentary angles

Explanation:

Complimentary angles are those two angles whose sum is 90 whereas two angles whose sum is 180 are called Supplementary angles.

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2 306
Q:

Smallest prime number greater than 200?

 A) 201 B) 205 C) 211 D) 203

Answer & Explanation Answer: C) 211

Explanation:

From the trial and error method of division,

201 is divisible by 3

205 is divisible by 5

203 is divisible by 7

Hence, after eliminating three options, remained is 211 and is divisible by only 1 and itself.

Therefore, 211 is the smallest prime number greater than 200.

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1 309
Q:

Which statement best compares a line and a point?

 A) A point has no dimension and a line has one dimension. B) A line can have line segments on it whereas a point cannot be on any line segment. C) point is a location whereas a line has several planes located on it D) A line can lie on a plane whereas a point cannot lie on a plane.

Answer & Explanation Answer: A) A point has no dimension and a line has one dimension.

Explanation:

A point has no dimension and a line has one dimension is the statement that best compares a line and a point.

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1 484
Q:

9 tens 10 ones equals

 A) 910 B) 90 C) 91 D) 100

Answer & Explanation Answer: D) 100

Explanation:

9 tens 10 ones equals

=> 9 x 10 + 10 x 1

=> 90 + 10

=> 100.

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0 443
Q:

What is the value of 28 tens?

 A) 28 B) 2 C) 2800 D) 280

Answer & Explanation Answer: D) 280

Explanation:

Here asked for the value of 28 tens

=> 28 x 10 = 280.

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1 468
Q:

How many right angles does a square have?

 A) 2 B) 6 C) 4 D) 8

Answer & Explanation Answer: C) 4

Explanation:

A square and a rectangle each have 4 right (90 deg) angles.

Both square and rctangle have 4 sides and 4 angles, but the only difference is square is a rectangle with all sides equal.

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1 443