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Q:

Solve the value of D?

Answer

A + B = 15 .... (1)


B x C = 84 .... (2)


C ÷ 4 = 3  .... (3)


B + D = 18 .... (4)


From (3), we get C = 12


From (2), we get B = 84/12 = 7


From (1), we get A = 15 - 7 = 8


From (4), we get D = 18 - 7 = 11


 


Hence, D = 11.

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Subject: Math Puzzles Exam Prep: Bank Exams
Job Role: Bank Clerk , Bank PO

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Q:

When light enters from air to water, then its 

A) frequency increases and speed decreases B) frequency is same but the wavelength is smaller in water than in air
C) frequency is same but the wavelength is larger in water than in air D) frequency and speed both decreases
 
Answer & Explanation Answer: B) frequency is same but the wavelength is smaller in water than in air

Explanation:
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Filed Under: Physics

13 9482
Q:

Which solution has the highest pH?

A) 50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq) B) 50.0 mL 0.0500 M sodium hydroxide, NaOH (aq)
C) 50.0 mL 0.0500 M nitric acid, HNO3 (aq) D) 50.0 mL 0.0500 M nitrous acid, HNO2 (aq)
 
Answer & Explanation Answer: A) 50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq)

Explanation:

50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq) has the highest pH value.

Sodium hydroxide and Calcium hydroxide are strong bases so they completely ionize in solution. Because they ionize at the same rate, and Calcium hydroxide has the higher pH calculated, then Calcium hydroxide, in fact, has the highest pH.

Nitric acid is a strong acid, so it completely ionizes in water. Whilst nitrous acid is a weak acid. Therefore, the nitric acid solution has the LOWEST ph.

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Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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8 9482
Q:

TEL minimise the knocking effect when mixed with petrol, it acts as_______

A) Positive catalyst B) Negative catalyst
C) Auto catalyst D) Induced catalyst
 
Answer & Explanation Answer: B) Negative catalyst

Explanation:
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Filed Under: Chemistry

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Q:

In diseases like Polio, the cells that get destroyed by virus, are

A) Monocytes B) Erythrocytes
C) Motor neurons D) Sensory neurons
 
Answer & Explanation Answer: C) Motor neurons

Explanation:
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Filed Under: Biology

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Q:

What is the International Date Line ?

A) It is the equator B) It is the 0 degrees longitude
C) It is the 90 degrees longitude D) It is the 180 degrees longitude
 
Answer & Explanation Answer: D) It is the 180 degrees longitude

Explanation:
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Filed Under: World Geography

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Q:

The Number of members included in the Constitution Drafting Committee was:

A) Seven B) Nine
C) Eleven D) Thirteen
 
Answer & Explanation Answer: A) Seven

Explanation:
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Filed Under: Indian Politics

20 9476
Q:

A group of eight bits is called

A) buzz B) nibble
C) byte D) word
 
Answer & Explanation Answer: C) byte

Explanation:

A group of eight bits is called as a byte and that of 4 bits is called as a nibble.

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Filed Under: Computer
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