Question Discussion & Solution

Given equation: 49 A 7 B 5 C 6 = ?

After interchanging alphabets: 49 ÷ 7 + 5 × 6 = ?

7 + 30

37

Hence, ‘37’ is the answer.

Binary search algorithm:

Binary search algorithm is used to find an element in an already sorted array.

STEPS 1:

It finds the middle element of the array and compare the element with the element to be searched, if

it matches then return true.

STEPS 2:

If not, then divide the array into two halves in which if element to be search is less than middle

element then search takes place in left part otherwise search in right half.

STEP 3:

Repeat this process, until you get the element.

Explanation:

Best case of Binary search occurs when element to be searched is the middle element of the array.

Then in that case, it just simply compares the element with the middle element, if matches then return

true.  Comparing with the one element will take only O(1) time complexity.

Best Case: Search 35 in below give array

T(n) = O(1)

Least possible diagram is:

I. Some nice are rich → True

II. Some bad are nice → False (Possible but not definite)

III. All poor are nice → False (Possible but not definite)

The Correct Answer is Option 1 i.e Baking powder.

• Baking powder:
  • Baking powder is a mixture of baking soda and tartaric acid .
  • Tartaric acid has been added to baking powder to neutralize the bitterness produced by sodium bicarbonate (NaHCO₃) .
• Baking soda:
  • It is commonly known as sodium bicarbonate.
  • Sodium bicarbonate is a white crystalline solid.
  • It is used in baking products like cakes, cookies etc.
• Washing Soda:
  • It is commonly known as Na2CO3 or sodium carbonate.
  • It is used in softening of hard water.
  • It is commonly used as a cleaning agent for domestic purposes.It is also used in the manufacturing of paper, soap, textiles, paints, etc.
• Vinegar:
  • Vinegar is produced from fermentation of alcohol.
  • Vinegar is the natural source for acetic acid.
  • It is widely used as a flavouring agent in most of the cuisines.

Concept:

• Heat Transfer: Heat is transferred from one place to another in substance due to temperature difference. 

• Evaporation: In this process, the liquid form a substance tends to convert in the gaseous phase on the uppermost surface due to heat and pressure.
• Condensation: In this process, the gaseous phase of an object tends to convert into liquid form due to pressure and temperature.

Explanation:

The other end of a wooden spoon will not become cold when it is dipped in a cup of ice cream because wood is a bad conductor, not a good conductor.