21). Find the value of \( \Large 1^{3}+2^{3}+....+10^{3} \)
A). 2525 |
B). 3025 |
C). 4355 |
D). 5765 |
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22). If a=5, d=3, find 40th term.
A). 122 |
B). 160 |
C). 142 |
D). 124 |
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23). Find the sum 9+15+27+....+195.
A). 3244 |
B). 3344 |
C). 3264 |
D). 3364 |
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24). 24. In an AP the first element is 5. There are 15 terms. The sum is 390. Find the common difference and the value of the middle term.
A). 4, 28 |
B). 3, 26 |
C). 5, 30 |
D). 6, 24 |
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25). In a GP 96, 48, 24 ...... find the value of the 6th term.
A). 3 |
B). 6 |
C). \( \Large \frac{3}{4} \) |
D). \( \Large \frac{3}{16} \) |
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26). In a GP 2, 6, 18, 54 .... find how many terms are there, if their sum is 728.
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27). Find the sum 24+25+....+100
A). 4774 |
B). 4674 |
C). 4764 |
D). 4467 |
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28). Find the sum of 1+3+5+....+45
A). 540 |
B). 539 |
C). 529 |
D). 579 |
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29). Find the sum of \( \Large 21^{2}+22^{2}+....+60^{2} \)
A). 70940 |
B). 2870 |
C). 12810 |
D). 9946 |
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30). Find the sum of \( \Large 1^{3}+2^{3}+....+10^{3} \)
A). 163675 |
B). 3025 |
C). 163765 |
D). cannot be determined |
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