The barter system is NOT a function of money. It is an alternative system where goods and services are exchanged directly for other goods and services without the use of money.
69, 35.5, 39.5, 68.25, 152.5, ?
78, 80, 84, ?, 108, 140
5 6 14 45 ? 925
...252, 128, 66, 35, 19.5, ?
14, 17, 23, 32, ?, 59
What will come in place of the question mark (?) in the following series?
4, 11, 32, 95, 284, 851, ?
72, 97, 147, ?, 322, 447
10, 10, 30, 150, ?, 9450
43 86 258 ? 5160 30960
...18, 21, 45, 138, 555, ?
