Which one of not a primary macro

37, 49, 63, ?,  97, 117

36, 72, 47, 63, ?, 58

53 × 38 + 32 × ∛54872 = ?

418, 406, 430, 382, 478, ?, 670

16, 32, 68, 132, ?, 376

In each of the following series, one term is missing. Find the missing term.

2, 6, 15, 31, 56, ?

What will come in place of the question mark (?) in the following series?


2, 5, 10, 17, 26, ?, 50

79, 248, ?,  225, 125, 206

What should come in place of (?) question mark in the given number series.

81, 73, 66, 60, 55, ?

226, 171, 124, 85, 54, ?