Number Series Practice problems along with Concept Explanation for Quantitative Aptitude section of Bank Exams -Day 3

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1)  16  8  12  30  105   __?

                                     

Answer: 472.5

Explanation: In this series each number is multiplied with 0.5 first , then 1.5 next , with 2.5 next and so on . i.e 16X0.5=8, 8X1.5=12, 12X2.5=30, 30X3.5=105, 105X4.5=472.5.

2) 4  5  9 14  23  37  __?

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Answer: 60

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Explanation : Addition  previous two numbers gives next number  i.e 4+5=9, 5+9=14, 14+9=23, 23+14=37 , 37+23=60.

3) 15  17 14 18  ? 19

Answer :13

Explanation: Adding and subtracting in increasing order gives subsequent numbers i.e  15+2=17,  17-3=14,  14+4=18, 18-5=13, 13+6=19.

4) 2  3 6  15  45  ?

Answer : 157.5

Explanation : The next number in the series is obtained by multiplying previous number with increasing 0.5 order. i.e 2X1.5=3, 3X2=6, 6X2.5=15, 15X3=45 and 45X3.5=157.5.

5) 2 6  14  30  ?  126

Answer: 62

Explanation : 

2+(4X2⁰ )=6,

6+(4X2¹)=14,

14+(4X2²)=30 and

30+(4X2³)=62  .               

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