Aptitude  Number series  Practice Q&A

21. 4500 x ? = 3375

$ \dfrac{2}{5} $ $ \dfrac{3}{4} $ $ \dfrac{1}{4} $ $ \dfrac{3}{5} $

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22. What smallest number should be added to 4456 so that the sum is completely divisible by 6 ?

4 3 2 1

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23. What least number must be subtracted from 13601, so that the remainder is divisible by 87 ?

23 31 29 37

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24. 476 ** 0 is divisible by both 3 and 11. The non-zero digits in the hundreds and tens places are respectively:

7 and 4 7 and 5 8 and 5 None of these

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25. If the number 97215 * 6 is completely divisible by 11, then the smallest whole number in place of * will be:

3 2 1 5

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26. 112 + 122 + 132 + ... + 202 = ?

385 2485 2870 3255

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27. If the number 5 * 2 is divisible by 6, then * = ?

2 3 6 7

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28. Which of the following numbers will completely divide (4915 - 1) ?

8 14 46 50

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29. 9+$\dfrac{3}{4}$+7+$\dfrac{2}{17}$-$\left(9+\dfrac{1}{15}\right)$=?

7 +$ \dfrac{719}{1020} $ 9 +$ \dfrac{817}{1020} $ 9 +$ \dfrac{719}{1020} $ 7 +$ \dfrac{817}{1020} $

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30. $\left(1-\dfrac{1}{n}\right)$+$\left(1-\dfrac{2}{n}\right)$+$\left(1-\dfrac{3}{n}\right)$+.....up to n terms=?

$ \dfrac{1}{2} $n $ \dfrac{1}{2} $(n - 1) $ \dfrac{1}{2} $n(n - 1) None of these

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