(A) Flavoring
(B) Fortification
(C) Fermentation
(D) None of these
The answer is: (B) Fortification
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The waves which are used for line of sight (LOS) communication are called:
(A) Space waves
(B) Cable waves
(C) Antenna waves
(D) None of these
The answer is: (A) Space waves
There are 20 Multiple Choice Questions (MCQs) in an exam with 4 options in every question. A student attempted the exam just on random guessing. How many questions (according to probability) he will attempt correctly?
(A) 4
(B) 5
(C) 6
(D) 7
The answer is: (B) 5
Solution
Out of 4 options only one is correct. So,
The cost of an article is Rs.160. What should be the selling price in rupees to obtain a profit of 15 percent?
(A) 180
(B) 182
(C) 184
(D) 186
The answer is: (C) 184
Solution
As we know that, Cost + Profit = Selling Price. Hence,
What is inverse of the function f(x)=2x-3?
(A) 3-2x
(B) 1-2x
(C) 2x-1
(D) (x+3)/2
The answer is: (D) (x+3)/2
Solution
What is the hardest natural substance on Earth?
(A) Gold
(B) Iron
(C) Diamond
(D) Quartz
The answer is: (C) Diamond
Diamond is the hardest known substance on the planet Earth.
What is |2|-|-2|-22-(-2)2=?
Q. What is: |2| – |–2| – 22 – (–2)2 = ?
(A) –8
(B) –6
(C) –4
(D) –2
The answer is: (A) –8
Solution
What is the sum of the sequence: 2+4+6+…+98+100=?
(A) 2450
(B) 2500
(C) 2550
(D) 2600
The answer is: (C) 2550
Solution
This is an arithmetic sequence with common difference of 2. The first element is 2, the last element is 100, and total elements (from 2 to 100) are 50. So, a1 = 2, an = 100, d = 2 and n = 50. So, by using the formula for the sum of n elements of an arithmetic sequence, we have
What is the sum of the numbers: 1, 2, 3, 4, …, 99, 100?
(A) 5000
(B) 5050
(C) 5100
(D) 5150
The answer is: (B) 5050
Solution
These are the first 100 natural numbers (n=100). So, by applying formula for the sum of the first n natural numbers, we have
In a class of 60 students the ratio of boys to girls is 3:2. How many girls are there in the class?
(A) 21
(B) 22
(C) 23
(D) 24
The answer is: (D) 24
Solution
