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JMI 6th Entrance Paper 2019 answer key and explanation

26. Which among the following are twin prime numbers?

  • (A) 31 and 37
  • (B) 7 and 11
  • (C) 11 and 13
  • (D) 3 and 7

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

  • (A) A scalene A
  • (B) An isosceles A
  • (C) An equilateral A
  • (D) A right angled A

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.

  • (A) Protractor
  • (B) Compass
  • (C) Divider
  • (D) Ruler

Answer:

(A) Protractor

Explanation:

A protractor is a specific mathematical tool designed for measuring angles.


29. An isosceles triangle

  • (A) Is a triangle whose two sides and two angles are equal
  • (B) Is a triangle whose all the three sides and three angles are equal
  • (C) Is a triangle whose all the three sides and angles measure different
  • (D) Is a triangle with two acute angles.

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:

  • (A) 6: 10
  • (B) 15: 25
  • (C) 0.75: 1.25
  • (D) 3:5

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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