Question
The average of 9 consecutive numbers is 20. The smallest
of these numbers is:Solution
Let, the 9 consecutive numbers are x, (x + 1), (x + 2), (x + 3), (x + 4), (x + 5), (x + 6), (x + 7), (x + 8) So, [x + (x + 1) + (x + 2) + (x + 3) + (x + 4) + (x + 5) + (x + 6) + (x + 7) + (x + 8)]/9 = 20 ⇒ (9x + 36)/9 = 20 ⇒ 9x + 36 = 180 ⇒ 9x = 180 - 36 = 144 ⇒ x = 144/9 = 16
Find the missing number, in the given number series.
6, 12, 36, ?, 720, 4320
81, 41, 42, 64.5, ?, 330
Find the missing number in the given number series.
1, 2, 3, 6, 11, 20, ?If series II follows the same sequence pattern as series I shown below, determine the value of 'p'.
Series I: 40, 25, 30, 50, 105, 267.5
<...37, 49, 63, ?, 97, 117
What will come in place of the question mark (?) in the following series?
4, 8, 24, ?, 480, 2880
13 19 32 52 ? 113
What will come in place of the question mark (?) in the following series?
21, 36, 66, 126, ?, 486
The question below is based on the given series I. The series I satisfy a certain pattern, follow the same pattern in series II and answer the questions...
50, 64, 80, 98, 118, ?
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