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nth Term of A.P

5, 7, 20, 21,...

Question

5, 7, 20, 21, 80, 63, ?, 189

300

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305

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310

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315

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320

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Solution

The correct option is B 320
The given series consists of two series in alternate terms: namely
(i) 5, 20, 80, 320 and
(ii) 7, 21, 63, 189
Missing term belongs to series (i) which is $80 \times 4$ i.e. 320

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Similar questions

Find

(i) (ii) (iii)

(iv) (v)

2 \frac{1}{3} \times 4 \frac{3}{5}

\frac{5}{7} \div 20

Question 2 (ii)

Find:
$\frac{5}{63} - (\frac{- 6}{21})$

29 + (- 21 - 7) + 40 - (- 27 - 32)

63 \div 3 - 12 + 7 + 6

Multiply and express as a mixed fraction:

(a) (b)

(e) (f)

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