NIMCET 2020 Previous Year Questions (PYQs) – Page 5 of 12

Let the original fraction be N/D.

According to the problem:

• Numerator is increased by 25% → New numerator = 1.25N
• Denominator is decreased by 20% → New denominator = 0.8D

So, new fraction =
(1.25N) / (0.8D) = 5/4

Simplify:
(1.25 / 0.8) × (N/D) = 5/4
(1.25 ÷ 0.8) = 1.5625 = 25/16

⇒ (25/16) × (N/D) = 5/4

⇒ N/D = (5/4) × (16/25)
= 80 / 100
= 4/5

✅ Final Answer: The original fraction = 4/5

✅ Memory Unit Communication with CPU:

The memory unit which directly communicates with the CPU is known as:

✅ Primary Memory:

Primary memory, also called Main Memory, includes components like RAM (Random Access Memory) and Cache Memory.

✅ Why Primary Memory?

Primary memory is directly accessible by the CPU, allowing it to fetch data and instructions quickly for processing.

✅ Final Answer:

The memory unit that directly communicates with the CPU is: Primary Memory or Main Memory