Day 308: NDA Maths
5 questions (7 parts). Try each one first, then open its answer.
Question 1 (case study, 3 parts)
Permutation & Combination. Asked once: NDA 2 2022
Consider the following for the next three (03) items that follow: Consider the word 'QUESTION':25How many 4-letter words each of two vowels and two consonants with or without meaning, can be formed?Tap an option to check your answer.
26How many 8-letter words with or without meaning, can be formed such that consonants and vowels occupy alternate positions?Tap an option to check your answer.
27How many 8-letter words with or without meaning, can be formed so that all consonants are together?Tap an option to check your answer.
Question 2
Probability. Asked once: NDA 2 2025
107A person speaks the truth 4 out of 5 times and person speaks the truth 5 out of 6 times. What is the probability that they will contradict each other in stating the fact?Tap an option to check your answer.
Question 3
Properties of Triangle. Asked once: NDA 2 2022
12What is the diameter of a circle inscribed in a regular polygon of 12 sides, each of length 1 cm?Tap an option to check your answer.
Question 4
Quadratic Equations. Asked once: NDA 1 2024
8If and are roots of the equation where are integers, then which one of the following is correct?Tap an option to check your answer.
Question 5
Sequence & Series. Asked once: NDA 2 2022
Consider the following statements: 1. 2 + 4 + 6 + … + 2n = n² + n 2. The expression n² + n + 41 always gives a prime number for every natural number n10Which of the above statements is/are correct?Tap an option to check your answer.