What should come in place of the question mark (?) in the given series? 170 150 133 119 108 ?
100
Find the differences between consecutive terms: 170 − 150 = 20, 150 − 133 = 17, 133 − 119 = 14, 119 − 108 = 11.
These differences themselves decrease by 3 each time: 20, 17, 14, 11, so the next difference is 11 − 3 = 8.
Subtract this from the last term: 108 − 8 = 100.
Hence, the number that should come in place of the question mark is 100.
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Important Questions from Series
Select the option figure in which the given figure (X) is embedded (rotation is NOT allowed).
Identify the figure given in the options which when put in place of ? will logically complete the series.
When is a series of terms said to be in the order of increasing extension?
(A) When each term in the series (except the first) denotes a class having more members than a class denoted by the term preceding it.
(B) When the class size gets larger with each successive term.
(C) When each term in the series (except the first) denotes a class having fewer members than the class denoted by the term preceding it.
(D) When the class size gets smaller with each successive term
Choose the most appropriate answer from the options given below :
In the following question, select the missing number from the given series.
5, 10, 17, 26, 37, ?, 65
In the following question, select the missing number from the given series.
5, 10, 17, 26, 37, ?, 65
