NDA Mathematics 4 September 2022 | NDA Year Wise Previous Years Questions

Mathematics

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NDA Mathematics 4 September 2022

MCQ (Single Correct Answer)

+2.5

-0.83

Consider the word 'QUESTION' :

How many 4-letter words each of two vowels and two consonants with or without meaning, can be formed ?

144

576

864

NDA Mathematics 4 September 2022

MCQ (Single Correct Answer)

+2.5

-0.83

Consider the word 'QUESTION' :

How many 8-letter words with or without meaning, can be formed such that consonants and vowels occupy alternate positions?

288

576

1152

2304

NDA Mathematics 4 September 2022

MCQ (Single Correct Answer)

+2.5

-0.83

Consider the word 'QUESTION' :

How many 8-letter words with or without meaning, can be formed so that all consonants are together?

5760

2880

1440

720

NDA Mathematics 4 September 2022

MCQ (Single Correct Answer)

+2.5

-0.83

Let Δ be the determinant of a matrix A, where A = $\left[\begin{array}{lll}a_{11} & a_{12} & a_{13} \\ a_{21} & a_{22} & a_{23} \\ a_{31} & a_{32} & a_{33} \end{array}\right]$ and C11, C12, C13 be the cofactors of a11, a12, a13 respectively.

What is the value of a11C11 + a12C12 + a13C13 ?

−Δ

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