Page 118 - CT&AI_CLasa_7_Part_1

DecomPosiTion (b) Barter → coins → paper money →
6. Which option best decomposes the
digital money
difficulties faced in barter exchange?
(c) Coins → barter → digital money →
(a) Demand → Supply → Trade →
Profit paper money
(b) Double coincidence → Lack of (d) Paper money → barter → coins →
value measure → Divisibility → digital money
Portability → Durability
(c) Coins → Trade → Value → Storage 9. If money did not function as a store of value,
what would most likely occur?
(d) Production → Distribution →
(a) People would save more wealth.
Consumption
7. Which decomposition correctly explains how (b) Goods would be stored instead,
digital payment works using QR codes? leading to spoilage issues.

(a) Scan → Store → Print → Exchange (c) Trade would become faster.

(b) Scan → Display details → Enter (d) Digital payments would increase.
amount → Transfer money
(c) Enter amount → Scan → Withdraw 10. If the problem of portability in barter was
→ Pay solved but others remained, what would still
(d) Transfer → Scan → Store → limit trade?
Confirm (a) Ease of transport.
AlgoriThmic Thinking
8. Which sequence best represents the logical (b) Double coincidence of wants and
transition in the evolution of exchange lack of value measurement.
systems?
(c) Increase in durability.
(a) Digital money → coins → barter →
paper money (d) Reduction in negotiation.

A survey was conducted among 100 people about the introduction of money:
40 people said it was introduced to overcome barter difficulties.
25 people said it helped as a common measure of value.
20 people said it helps in storing value.
15 people said it makes future payments easier.
Students made the following statements:
Aman: Storage of value was the main reason.
Meera: Overcoming barter difficulties was the main reason.
Ravi: Future payments was the main reason.
Neha: All reasons are equally important.
Who is correct?

(a) Aman (b) Meera

(c) Ravi (d) Neha

116 Computational Thinking-7 (Social Science)