12, 15, 21, 30, 42, 57, ? – McqOptions

MCQOPTIONS

Saved Bookmarks

→ Aptitude
→ Algebra in Aptitude
→ 12, 15, 21, 30, 42, 57, ?..

1.	12, 15, 21, 30, 42, 57, ?
A.	59
B.	63
C.	65
D.	75
Answer» E.

Discussion

No Comment Found

Related MCQs

1 + (3 + 1) (3 + 1) (3<sup>4</sup> + 1) (3<sup>8</sup> + 1) (3<sup>16</sup> + 1) (3<sup>32</sup> + 1) is equal to
The fifth term of the sequence for which t<sub>1</sub> = 1, t<sub>2</sub> = 2 and t<sub>n + 2</sub> = t<sub>n</sub> + t<sub>n + 1</sub>, is
If p, q, r are in Geometric Progression, then which is true among the following ?
Find the nth term of the following sequence :<br>5 + 55 + 555 + ....... T<sub>n</sub>
The value of <br><table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>3</center></td><td rowspan="2"> + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>5</center></td><td rowspan="2"> + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>7</center></td><td rowspan="2"> + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>9</center></td><td rowspan="2"> + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>11</center></td><td rowspan="2"> + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>13</center></td><td rowspan="2"> + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>15</center></td><td rowspan="2"> + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>17</center></td><td rowspan="2"> + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>19</center></td><td rowspan="2"> is</td></tr><tr><td style="text-align: center;">1 .2 </td><td style="text-align: center;">2 .3 </td><td style="text-align: center;">3 .4 </td><td style="text-align: center;">4 .5 </td><td style="text-align: center;">5 .6 </td><td style="text-align: center;">6 .7 </td><td style="text-align: center;">7 .8 </td><td style="text-align: center;">8 .9 </td><td style="text-align: center;">9 .10 </td></tr></table>
<table><tr><td rowspan="2">The 30th term of the series 30, 25</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">, 21 , 16</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">,........ is</td></tr><tr><td style="text-align: center;">2</td><td style="text-align: center;">2</td></tr></table><br>
Find the sum of the first five terms of the following series.<br><table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> + .......... + .........</td></tr><tr><td style="text-align: center;">1 4</td><td style="text-align: center;">4 7</td><td style="text-align: center;">7 10</td></tr></table>
The age of the father of two children is twice that of the elder one added to four times that of the younger one. If the geometric mean of the ages of the two children is 4 <span style="text-decoration:overline">3</span> and their harmonic mean is 6, then what is the father's age ?
<table><tr><td rowspan="2">The next term of the sequence </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> , 3</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">, 6 , 8</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>3</center></td><td rowspan="2"> ..............is : </td></tr><tr><td style="text-align: center;">x - 2</td><td style="text-align: center;">4</td><td style="text-align: center;">4</td></tr></table>
840, ?, 420, 140, 35, 7

Related Topics

Algebra in Aptitude

Alligation or Mixture in Aptitude

Approximation in Aptitude

Aptitude Question in Aptitude

Aptitude miscellaneous in Aptitude

Area and Perimeter in Aptitude

Average in Aptitude

Banker's Discount in Aptitude

Boats and Streams in Aptitude

Clocks and Calendars in Aptitude

Recent Visits

Reply to Comment

Name *

Email *

Comment *

© Copyright 2025 McqOptions. All rights reserved.

Terms & Conditions
Privacy Policy
Disclaimer

Support: admin@mcqoptions.com