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Q:

Find the lowest 4-digit number which when divided by 3, 4 or 5 leaves a remainder of 2 in each case ?

A) 1020 B) 1040
C) 1060 D) 1022
 
Answer & Explanation Answer: D) 1022

Explanation:

Lowest 4-digit number is 1000.
LCM of 3, 4 and 5 is 60.
Dividing 1000 by 60, we get the remainder 40. Thus, the lowest 4-digit number that exactly divisible by 3, 4 and 5 is 1000 + (60 - 40) = 1020.
Now, add the remainder 2 that's required. Thus, the answer is 1022.

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Filed Under: Problems on Numbers
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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11 9792
Q:

If 6 men and 3 boys working together, can do four times as much work per hour as a man and a boy together. Find the ratio of the work done by a man and that of a boy for a given time  ?

A) 1 : 2 B) 2 : 1
C) 3 : 1 D) 1 : 3
 
Answer & Explanation Answer: A) 1 : 2

Explanation:

6M + 3B = 4(1M + 1B)
6M + 3B = 4M + 4B
2M = 1B

M/B = 1/2

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Filed Under: Ratios and Proportions
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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17 9095
Q:

A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If two marbles are picked at random, what is the probability that they are either blue or yellow ?

A) 3/17 B) 4/21
C) 2/21 D) 5/17
 
Answer & Explanation Answer: C) 2/21

Explanation:

Given that there are three blue marbles, four red marbles, six green marbles and two yellow marbles.

 

Probability that both marbles are blue = ³C₂/¹⁵C₂ = (3 x 2)/(15 x 14) = 1/35

Probability that both are yellow = ²C₂/¹⁵C₂ = (2 x 1)/(15 x 14) = 1/105

Probability that one blue and other is yellow = (³C₁ x ²C₁)/¹⁵C₂ = (2 x 3 x 2)/(15 x 14) = 2/35

 

Required probability = 1/35 + 1/105 + 2/35 = 3/35 + 1/105 = 1/35(3 + 1/3) = 10/(3 x 35) = 2/21

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Filed Under: Permutations and Combinations
Exam Prep: GATE , CAT , Bank Exams , AIEEE
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13 12271
Q:

A can do a piece of work in 15 days and B can do it in 16 days and C can do it 24 days. They started the work together and A leaves after 3 days and B leaves after 4 days from the beginning. How long will work lost ?

A) 10 2/3 days B) 13 1/5 days
C) 12 2/3 days D) 11 5/7 days
 
Answer & Explanation Answer: B) 13 1/5 days

Explanation:

3/15 + 4/16 + x/24 = 1

x=1315

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Filed Under: Time and Work
Exam Prep: GATE , CAT , Bank Exams , AIEEE
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3 4237
Q:

Which 'Water Body' separates Andaman and Nicobar Islands ?

A) Eleventh Degree Channel B) Andaman Sea
C) Bay of Bengal D) Ten Degree Channel
 
Answer & Explanation Answer: D) Ten Degree Channel

Explanation:
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Filed Under: Indian Geography
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17 10029
Q:

If today is Saturday, what will be the day 350 days from now  ?

A) Saturday B) Friday
C) Sunday D) Monday
 
Answer & Explanation Answer: A) Saturday

Explanation:

350 days = (350/7=50 weeks) i.e  No odd days,

 So it will be a Saturday.

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Filed Under: Calendar
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93 27077
Q:

The Human Resource Development Ministry and the External Affairs Ministry launched an online verification portal ___________ to make the document verification process easier.

A) e-bharat B) e-sanad
C) e-foriegn D) e-verify
 
Answer & Explanation Answer: B) e-sanad

Explanation:

The Human Resource Development Ministry and the External Affairs Ministry launched an online verification portal to make the document verification process easier for students who planning to study abroad. The Central Board of Secondary Education’s (CBSE) academic repository of degrees and certificates “Parinam Manjusha” was also involved in the project of creating “eSanad”.

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Filed Under: General Awareness
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3 3957
Q:

Which company has overtaken Oil and Natural Gas Corp (ONGC) to become India’s most profitable state-owned company  ?

A) Indian Oil Corporation B) SAIL
C) Hindustan Petroleum D) GAIL
 
Answer & Explanation Answer: A) Indian Oil Corporation

Explanation:

Indian Oil Corp (IOC) has overtaken Oil and Natural Gas Corp (ONGC) to become India’s most profitable state-owned company. IOC, which has for decades been India’s biggest company by turnover, posted a 70 per cent jump in net profit to Rs 19,106.40 crore in the financial year ended March 31, 2017.

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Filed Under: Indian Economy
Exam Prep: Bank Exams , CAT
Job Role: Bank Clerk

15 8041