This type of Series are based on square of a Number which is in same order and one square number is missing in that given series. Here we have provided some Examples:
Example 1: 441, 484, 529, 576, ? A. 565 B. 605 c. 655 D. 625 Ans: D
Example 2: 841, ?, 2401, 3481, 4761 A. 1071 B. 1331 c. 1411 D. 1521 Ans: D
Example 3:289, 225, 169, ?, 81 A. 131 B. 119 c. 121 D. 111 Ans: C
Example 4: 121, 144, 169, ?, 225 A. 196 B. 199 c. 206 D. 211 Ans: A
Example 5: ?, 2116, 2209, 2304, 2401, 5200 A. 2099 B. 2055 c. 2025 D. 1955 Ans: C
Example 5: ?, 64, 81, 100, 121 A. 45 B. 49 c. 53 D. 57 Ans: B

This type of series are based on Cube of a number which is in the same order and one cube number is missing in that given series. Example 1: 3375, ?, 24389, 46656, 79507 A. 10442 B. 10648 c. 11976 D. 18002 Ans: B
Example 2: 729, 6859,24389, ?, 117649, 205379 A. 58937 B. 52335 c. 55324 D. 59319 Ans: D
Example 3: 1000, 8000, 27000, 64000, ? A. 125000 B. 156000 c. 132000 D. 163000 Ans: A
Example 4: 1331, ?, 35937, 85184, 166375 A. 10539 B. 10538 c. 10649 D. 10648 Ans: D
Example 5: 125, ?, 343, 512, 729, 1000 A. 208 B. 216 c. 224 D. 285 Ans: B

This type of Series are based on ration series, where sequence are in form of ratio in difference between the numbers.All numbers are arranged in ratio sequence order.

A ratio is a relationship between two numbers by division of the same kind. The ratio of a:b is written as a:b = a/b.
Example The artio 4:9 can be represented as 4/9. so, Antecedent = 4 and consequent = 9.
Proportion: The idea of proportion is that two ratios are like equal If a : b = c : d. then we can write a : b ::c : d. Here, a and d is called extremes and b and c is called mean terms. Example 3/15 = 1/15
Proportion of Quantities: The four Quantities like a, b, c, d are proportion, then we can express it as a:b = c:d then, a : b :: c : d (a x d) = (b x c) Product of means = product of Extremes If there is given three quantities like a, d, c of same like, then we can say it's proportion are continued. a : d = d : c Here d is called mean term and a and c are called Extremes.

This type of series is based on ascending or descending sequence of numbers and each continuous number is obtained by multiplying or dividing the preceding number with static number. Example 1: 3, ?, 45, 144, 585 A. 18 B. 21 C. 23 D. 27 Ans: A
Example 2: 5, 45, 405, 3645, ? A. 26832 B. 28667 C. 30551 D. 32805 Ans: D
Example 3: 73205, 6655, 605, 55, ? A. 3 B. 4 C. 5 D. 7 Ans: C
Example 4: 21, 84, 336, ?, 5376 A. 1344 B. 1262 C. 1173 D. 1061 Ans: A
Two stage Type Series A two Stage type series are obtain from differences of Continuous numbers themselves. Example 3, 9, 18, 35, 58, .... 6, 9, 17, 23, ....

This type of series has more than one different order are given, which has arranged in alternatively in a single series.
Example 1: 180, 179, 160, 156, 224, ? A. 88 B. 99 C. 100 D. 110 Ans: B
Example 2: 6, ?, 33, 69, 141, 285 A. 15 B. 18 C. 22 D. 31 Ans: A
Example 3: 4, 16, 64, 256, 1024, ? A. 4096 B. 3308 C. 4290 D. 2896 Ans: A