Question
Out of 6 numbers, the sum of the first 5 numbers is 7
times the number. If their average is 136, then the 6th number is:Solution
Average of 6 numbers = 136 (average = sum of terms/number of terms) Sum of 6 numbers = 136 × 6 = 816 ---(1) Let the 6th number be x. Sum of 5 numbers = 7x From eq(1), 7x + x = 816 x = 816/8 = 102 The 6th number is 102.
254, ?, 1022, 1150, 1214, 1246
80, 120, 30, 45, 9, 13.5, ?
252, 128, 66, 35, 19.5, ?
1029, 1030, 1039, 1064, ?, 1194
What will come in place of the question mark (?) in the following series?
28, 45, 75, 118, 174, ?1     1      4       ?      280       3640
...230 192 172 ? 122 100
...- What will come in place of the question mark (?) in the following series?
6, 6, 9, ?, 32, 56 What value should come in the place of (?) in the following number series?
5670, 1620, 540, 216, 108, ?
What will come in place of the question mark (?) in the following number series?
124, 131, 117, ?, 110, 145
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