Number Series - Number series MCQ

21:

4,3,12,9,2,18,3, ...21

 A. 5 B. 4 C. 3 D. 7 Answer Report Discuss Option: D Explanation : 4x3=12, 9x2=18 and 3x7=21 Click on Discuss to view users comments. Write your comments here:
22:

78,65,75,62,72...?

 A. 61 B. 65 C. 64 D. 59 Answer Report Discuss Option: D Explanation : There are two series78,75,72 and 65,62,59 Click on Discuss to view users comments. Write your comments here:
23:

6,5,24,25,144,(?)

 A. 155 B. 160 C. 170 D. 175 Answer Report Discuss Option: D Explanation : IIIrd term is=Ist termx4,i.e.,6x4=24 IVth term is =IInd term x 5,i.e,5x5=25 Vth term is = IVth termx7,i.e.,25x7=175 Multipliers are in the increasing order of 4,5,6,7, etc Click on Discuss to view users comments. Write your comments here:
24:

60,30,120,15,240?

 A. 30 B. 120 C. 240 D. 7 1/2 Answer Report Discuss Option: D Explanation : there are two seriee=s 60,120,240 and 30,15,7 1/2 etc. The terms in the first series are doubling and in the IInd they are being halved Click on Discuss to view users comments. Write your comments here:
25:

6,24,60,120,336,(?)

 A. 270 B. 240 C. 210 D. 336 Answer Report Discuss Option: D Explanation : There are three groups in the series 6 ---24,60,---120 and 366---366 and ratios are 1:4, 1:2 and 1:1 Click on Discuss to view users comments. Write your comments here:

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