Bank PO Questions


Q:

Find the sum to 200 terms of the series 2 + 5 + 7 + 6 + 12 + 7 + ....

A) 30,400 B) 30,200
C) 34,600 D) 38,400
 
Answer & Explanation Answer: A) 30,400

Explanation:

we can treat every two consecutive terms as one.
So, we will have a total of 100 terms of the nature:
(2 + 5) + (7 + 6) + (12 + 7).... => 7, 13, 19,....

 

We know the sum of n terms  nn+12

 

Now, a= 7, d=6 and n=100
Hence the sum of the given series is
S= 100/2 x[2 x 7 + 99 x 6]
=> 50[608]
=> 30,400.

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Filed Under: Numbers
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5 4580
Q:

Which of the following is not a sedimentary structure?

A) Magma emplacement B) Mud cracks
C) Ripple marks D) Cross beds
 
Answer & Explanation Answer: A) Magma emplacement

Explanation:

sedimentary features all are related to water deposited minerals and rocks.

Which of your choices has nothing to do with water is not a sedimwntary structure. Here in the given choices Magma emplacement is not a sedimentary structure.

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Filed Under: General Science
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3 4579
Q:

Cryogenic Engines find applications in

A) Frost - Free refrigerators B) Sub-marine propulsion
C) Researches in superconductivity D) Rocket technology
 
Answer & Explanation Answer: D) Rocket technology

Explanation:

Cryogenic Engines find applications in Rocket technology. A cryogenic rocket engine is a rocket engine that uses a cryogenic fuel or oxidizer, that is, its fuel or oxidizer are gases liquefied and stored at very low temperatures. Notably, these engines were one of the main factors of NASA's success in reaching the Moon by the Saturn V rocket.

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Filed Under: Physics
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2 4573
Q:

Guess the Number missed in Number Challenge ?

18034303_1300193573421077_7214011606574212801_n1499930701.jpg image

A) 3 B) 5
C) 9 D) 1
 
Answer & Explanation Answer: B) 5

Explanation:

Sum of numbers in all individual boxes must be equal.

Here sum must be equal to 30.

=> x + 14 + 9 + 2 = 30 => x = 5. 

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Filed Under: Number Puzzles
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15 4571
Q:

Kilohertz is a unit which measures

A) Electromagnetic radio wave frequencies B) Electric resistance
C) Power used by a current of one ampere D) Voltage
 
Answer & Explanation Answer: A) Electromagnetic radio wave frequencies

Explanation:

The hertz (Hz) is defined as one cycle per second and is a SI unit of frequency. Here kilohertz is also a unit of frequency of waves and is defined as 1000 cycles per second. Radio waves are measured in kilohertz (KHz).

 

Kilohertz_is_a_unit_which_measures1561453991.jpg image

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Filed Under: Physics
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5 4570
Q:

Mr. X sold two properties P1 and P2 for Rs 1,00,000 each. He sold property P1 for 20% less than what he paid for it. What is the percentage of profit of property P2, so that he is not in gain or loss on the sale of two properties?

A) 33.33% B) 29.97%
C) 25% D) 22.22%
 
Answer & Explanation Answer: A) 33.33%

Explanation:

Let 'A' be the cost price of property P1.

Then from the given data, the selling price of P1 = Rs. 1,00,000

He got 20% loss on selling P1

A - 20A100 = 100000A = 1,25,000

Therefore, the amount he lossed on selling P1 = 25,000

As ge he got no loss or gain on sale of P1 and P2, the gain on selling P2 = 25,000

But the selling price of P2 = 1,00,000 => Cost price of P2 = 75,000

 

Hence, the profit percentage on P2 = GainCPx 100 = 2500075000x100 = 1003= 33.33%

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Filed Under: Profit and Loss
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Q:

A watch which gains uniformly is 2 minutes low at noon on Tuesday and is 4 min 48 sec fast at 2 p.m. on the following Tuesday. When was it correct ?

A) 12 p.m. on Wednesday B) 2 p.m. on Thursday
C) 3 p.m. on Thursday D) 2 p.m. on Wednesday
 
Answer & Explanation Answer: B) 2 p.m. on Thursday

Explanation:

Time from 12 p.m. on Tuesday to 2 p.m. on the following Tuesday = 7 days 2 hours.
= 170 hours.
The watch gains = (2 + 4 x 4/5) min
= 34/5 min. in 170 hrs.
Now, 34/5 min are gained in 170 hrs.
Then, 2 min are gained in (170 x 5/34 x 2) hrs.
Watch is correct after 2 days 2 hrs after 12 p.m. on Tuesday, i.e., it will be correct at 2 p.m. on Thursday.

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Q:

RAM is used as a short memory because it is

A) expensive B) volatile
C) has small capacity D) programmable
 
Answer & Explanation Answer: B) volatile

Explanation:

RAM is used as a short-term memory because of its volatility.

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