Quantitative Aptitude for campus interviews – mathematics basics

Material consists of

Arithmetical Ability- Numbers- L.C.M & H.C.F.- Decimal fractions- Simplifacation- Square roots- Average- Problems on numbers- Problems on ages- Percentage- Profit & loss- Ratio & proportion- Partnership- Time & work- Time & distances- Problems on trains- Simple interest- Compound interest- Mixture- Area- Volume & Surface areas- Calendar- Clocks- Permutations &Combinations- Probability- Hights & distances-Data interpretation- Tabulation- Bar Graphs- Pie Charts- Line Graph

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Find the missing number in 16, 33, 65, 131, 261, _____

Answer: 523

Explanation:

Each number is twice the preceding one with 1 added or subtracted alternatively.

So, the next number is (2 x 261 + 1) = 523.

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Student A has secured 9 marks more than student B and A's marks was 56% of the sum of A&B's marks. The marks obtained by A and B are??

Answer: 

42,33

Explanation:

Let their marks be (x + 9) and x.

Then, x + 9 =	56	(x + 9 + x)
	100

 25(x + 9) = 14(2x + 9)

 3x = 99

 x = 33

So, their marks are 42 and 33.

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