21. A regular polygon with three sides is called :
(A) Right angle triangle
(B) equilateral triangle
(C) Obtuse triangle
(D) none of these
Answer:
(B) equilateral triangle
Explanation:
By definition, a “regular” polygon is both equilateral (all sides are equal) and equiangular (all angles are equal). For a three-sided polygon, this strictly defines an equilateral triangle.
22. How many zero’s are in one hundred lakh ?
(A) 7
(B) 6
(C) 13
(D) 8
Answer:
(A) 7
Explanation:
One hundred lakh represents the number one crore, which is written as 1,00,00,000. When counting the characters, there is one ‘1’ followed by seven ‘0’s, totaling 8 numerical digits.
23. If the cost price of a watch is Rs.1500 and selling price is Rs 1800 then loss or profit is :
(A) loss of 300
(B) profit Rs 300
(C) profit Rs 1500
(D) loss of 500
Answer:
(B) profit Rs 300
Explanation:
Profit is determined by subtracting the Cost Price (CP) from the Selling Price (SP). Since SP () is higher than CP (), there is a profit of . Profit = SP – CP = 1800 – 1500 = 300
24. Only prime number which is an even also.
(A) 3
(B) 5
(C) 2
(D) 11
Answer:
(C) 2
Explanation:
The number 2 is unique as the smallest prime number and the only even prime number. Any even number greater than 2 can be divided by 2, making them composite.
25. 25% of an hour is
(A) 20 minute
(B) 15 minute
(C) 10 minute
(D) 30 minute
Answer:
(B) 15 minute
Explanation:
There are 60 minutes in a standard hour. 25% is mathematically equivalent to one-quarter
