A series is given with one term missing. Select the correct alternative from the given ones that will complete the series. -438, -435, -429, ? , -408, -393, -375, -354
-420
This is a number-series problem where the pattern lives in the differences between consecutive terms rather than in the terms themselves.
Write out the given terms: \(-438,\ -435,\ -429,\ ?,\ -408,\ -393,\ -375,\ -354\).
First difference: \(-435 - (-438) = +3\). Next: \(-429 - (-435) = +6\).
The step increases by 3 each time, so the sequence of increments is \(+3,\ +6,\ +9,\ +12,\ +15,\ +18,\ +21\) — an arithmetic progression of common differences.
The missing term comes after \(-429\) using the \(+9\) step: \(-429 + 9 = -420\).
Verify forward: \(-420 + 12 = -408\), then \(-408 + 15 = -393\), \(-393 + 18 = -375\), \(-375 + 21 = -354\) — every later term matches.
The concept used is a second-level (quadratic) series, where the differences themselves form an arithmetic sequence.
Hence the missing term is -420.
A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
PW146, OV126, NU106, MT86, ?
A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
AR54, UL109, OF219, IZ439, ?
A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
FR120, CO176, ZL232, WI288, ?
A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
-6, -15, -57, -168, -669, -2004, ? , -24036
Find the next number in the sequence.
2, 6, 14, 30, 62, ?
A series is given with one term wrong. Select that wrong term from the given alternatives.
XL16, ET64, NB256, VJ1024, DR4096
A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
AX390, ZU350, YR310, XO270, ?
What should come next in the following series?
A4, C16, F36, J64, ?
Which of the following options will replace the question mark (?) in the given series?
Z1, X2, V3, T4, ?
Which of the following options will replace the question mark (?) in the given series?
A10, E8, I6, M4, ?
Identify the correct option to complete the following series.
5, 8, 13, 20, 29, ........., 53, 68, 85Select the alphanumeric-cluster from among the given options that can replace the question mark(?) in the following series.
2D, 3I, 4P, ?
From the given options, select the term that can replace the question mark (?) in the following series.
A1, B27, C125, ?Select the alphanumeric clusters from among the given options that can replace the question mark (?) in the following series.
z1, x4, v9, t16, ?
If all the special characters are dropped from the below arrangement, which of the following will be the 10th to the right of X?
3 X ! I B O # F 4 5 * 1 K 2 $ 8 R 8 % Z