# Aptitude  Number series  Practice Q&A

21. 4500 x ? = 3375

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

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

 4 3 2 1

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

 23 31 29 37

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

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

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

 385 2485 2870 3255

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

 2 3 6 7

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

 8 14 46 50

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 +$\dfrac{817}{1020}$

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