NDA Mathematics 18 April 2021 | Sequence And Series Question 95 | Mathematics

If the first term of an AP is 2 and the sum of the first five terms is equal to one-fourth of the sum of the next five terms, then what is the sum of the first ten terms?

-500

-250

500

250

NDA Mathematics 18 April 2021

MCQ (Single Correct Answer)

+2.5

-0.83

Consider the following statements:

1. If each term of a GP is multiplied by same non-zero number, then the resulting sequence is also a GP.

2. If each term of a GP is divided by same non-zero number, then the resulting sequence is also a GP.

Which of the above statements is/are correct?

1 only

2 only

Both 1 and 2

Neither 1 nor 2

NDA Mathematics 18 April 2021

MCQ (Single Correct Answer)

+2.5

-0.83

If x², x, -8 are in AP, then which one of the following is correct?

x ∈ {-2}

x ∈ {4}

x ∈ {-2, 4}

x ∈ {-4, 2}

NDA Mathematics 18 April 2021

MCQ (Single Correct Answer)

+2.5

-0.83

The third term of a GP is 3. What is the product of its first five terms?

243

729

Cannot be determined due to insufficient data

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