RRB NTPC CBT 2 Level 5 June-12-2022 Shift 1 Exam Previous Question Paper with Solutions

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111) In a certain code language, ‘MISTAKE’ is written as ‘LHRUBLF’ and ‘PROBLEM’ is written as ‘OQNCMFN’. How will ‘STRANGE’ be written in that language?

A) TUSAOHF
B) TUSBMFD
C) RSQBOHF
D) RSQBMFD

View Answer

C) RSQBOHF

Explanation:Here’s a shortcut method to solve coding-decoding questions like this:
—
Step-by-step Shortcut (based on examples):
Observe the transformation in first few letters only:
From `MISTAKE → LHRUBLF`:
* M → L (−1)
* I → H (−1)
* S → R (−1)
Then,
* T → U (+1)
* A → B (+1)
So the rule:
First 3 letters → shift -1,
Last 4 letters → shift +1
—
Apply the same to `STRANGE`:
Break into:
* S T R (−1)
* A N G E (+1)
Apply:
* S → R
* T → S
* R → Q
* A → B
* N → O
* G → H
* E → F
Answer: RSQBOHF
—
✅ Shortcut tip:
For 7-letter words in this pattern, just remember:
* Shift first 3 letters backward by 1
* Shift last 4 letters forward by 1
Let me know if you want a visual trick to memorize it faster!

112) A train covers a distance of 57.6 km in 48 minutes.What is its speed in m/s?

A) 20
B) 24
C) 21
D) 18

View Answer

A) 20

Explanation:We are given:
* Distance = 57.6 km = 57,600 meters
* Time = 48 minutes = 2,880 seconds
Now, use the formula:
$\text{Speed} = \frac{\text{Distance}}{\text{Time}} = \frac{57600}{2880} = 20 \text{ m/s}$
✅ Correct answer: 1. 20 m/s
Would you like a tip for quickly converting km/h to m/s and vice versa?

113) A train running at 90 km/h crosses an electric pole in 18 seconds and a platform in 65 seconds. What is the length of the platform?

A) 1175 m
B) 1250 m
C) 1050 m
D) 1020 m

View Answer

A) 1175 m

Explanation:To find the length of the platform, we can follow these steps:
Step 1: Convert train speed from km/h to m/s
$90\ \text{km/h} = \frac{90 × 1000}{3600} = 25\ \text{m/s}$
Step 2: Find the length of the train
When the train crosses a pole in 18 seconds:
$\text{Length of train} = 25\ \text{m/s} × 18\ \text{s} = 450\ \text{m}$
Step 3: Find the length of the platform
When the train crosses the platform in 65 seconds:
$\text{Total distance (train + platform)} = 25\ \text{m/s} × 65\ \text{s} = 1625\ \text{m}$
So,
$\text{Length of platform} = 1625 - 450 = 1175\ \text{m}$
✅ Correct answer: 1. 1175 m
Would you like a quick shortcut trick to solve these kinds of problems faster?

114) A shopkeeper mixes 30 kg of rice which he purchased at ₹30/kg and 40 kg of rice which he purchased at ₹28/kg and he sells the entire mixture at ₹28/kg. What is the profit or loss percentage (approximated to nearest integer)?

A) 3% loss
B) 5% profit
C) 6% loss
D) 7% profit

View Answer

A) 3% loss

Explanation:We are given:
* 30 kg of rice at ₹30/kg → Cost = ₹900
* 40 kg of rice at ₹28/kg → Cost = ₹1120
* Total quantity = 70 kg
* Total cost = ₹900 + ₹1120 = ₹2020
* Selling price = ₹28/kg × 70 kg = ₹1960
Step 1: Calculate Profit/Loss
$\text{Loss} = \text{Cost Price} - \text{Selling Price} = 2020 - 1960 = ₹60$
Step 2: Calculate Loss Percentage
$\text{Loss \%} = \left( \frac{60}{2020} \right) × 100 \approx 2.97\% \approx 3\%$
✅ Correct Answer: 1. 3% loss
Would you like a quick tip on how to estimate such answers mentally?

115) 2 litres of a liquid having milk and water in the ratio 3:2 is mixed with 3 litres of a liquid having milk and water in the ratio 23. Find the ratio of milk to water in the new mixture.

A) 9:4
B) 5:6
C) 12:13
D) 1:1

View Answer

C) 12:13

Explanation:We are given:
* Mixture 1: 2 litres, milk\:water = 3:2
⇒ Milk = $\frac{3}{5} × 2 = 1.2$ L, Water = $\frac{2}{5} × 2 = 0.8$ L
* Mixture 2: 3 litres, milk\:water = 2:3
⇒ Milk = $\frac{2}{5} × 3 = 1.2$ L, Water = $\frac{3}{5} × 3 = 1.8$ L
Total after mixing:
* Milk = 1.2 + 1.2 = 2.4 L
* Water = 0.8 + 1.8 = 2.6 L
Ratio of Milk : Water = 2.4 : 2.6
Divide both by 0.2 → $\frac{2.4}{0.2} : \frac{2.6}{0.2} = 12:13$
✅ Correct Answer: 3. 12:13
Would you like a quick visual or shortcut for mixing ratio problems?