26. Which among the following are twin prime numbers?
Answer:
(C) 11 and 13
Explanation:
Twin primes are pairs of prime numbers that have a difference of 2. Both 11 and 13 are prime, and 13 – 11 = 2.
27. A A with all sides of different length is called
Answer:
(A) A scalene A
Explanation:
A scalene triangle is the specific name for a triangle that has three sides of different lengths.
28. A ______ is used for measuring angles.
Answer:
(A) Protractor
Explanation:
A protractor is a specific mathematical tool designed for measuring angles.
29. An isosceles triangle
Answer:
(A) Is a triangle whose two sides and two angles are equal
Explanation:
An isosceles triangle is defined as having two sides of equal length, which also means the two angles opposite those sides are equal.
30. The simplest form of 1.5:2.5 is:
Answer:
(D) 3:5
Explanation:
To simplify the ratio, you can multiply both numbers by 10 to get 15:25. Then, divide both sides by their greatest common divisor, which is 5, to get 3:5.
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