Correct Answer: YBZA

Solution : Given:

AZB _, AZ _ Y, A _BY, _ ZBY

Let's check the given options –

First option: YBZA

The series becomes AZBY, AZBY, AZBY, AZBY 

The pattern in the series becomes AZBY / AZBY

Correct Answer: Open system

Solution : The correct option is open system.

Warming ammonium chloride with sodium hydroxide in a test tube is a common example of an open system. In an open system, both matter and energy may be exchanged with the environment. When ammonium chloride is burned with

Correct Answer: apprehensive

Solution : The correct answer is the fourth option.

The word "apprehensive" means intuition of some future mishap and it goes contextually correct with the sentence.

The meanings of other options are as follows:

• Regressive means to return to a less developed or worse state.
• Neoconservative 

Correct Answer:

Solution : As per the mirror image properties, closer things appear closer to the mirror in the reflection.
So, according to the above property and the information provided, the mirror is placed on the right side of the figure (on line PQ). So, the left side of the

Correct Answer: 8 cm

Solution : Given: The perimeter of an isosceles right triangle is $8(\sqrt{2}+1)$ cm.

The total of a triangle's sides is its perimeter.
Let the isosceles right triangle have equal sides of $x$ cm, then its hypotenuse is $\sqrt2x$ cm.
According to the question,
$x+x+\sqrt 2x=8(\sqrt{2}+1)$
⇒

Correct Answer: ÷, ×, +, =, ×, –

Solution : Given: 
72 @ 9 @ 3 @ 6 @ 6 @ 6 @ 6

Replace the @ signs with the assigned mathematical signs in the options one by one –
First option: ÷, ×, +, =, –, +
72 ÷

Correct Answer: 2.5%

Solution : 1 day = 24 hours = (24 × 60) minutes = 1440 minutes
So, the required percentage = $\frac{\text{36 }}{\text{1440}}$ × 100 = 2.5%
Hence, the correct answer is 2.5%.

Correct Answer: 120

Solution : Loss = 20% of cost price when the selling price of 90 pens is INR 80
Selling price = Cost price – Loss
⇒ INR 80 = cost price – 20% of cost price
⇒ INR 80 = 80% of cost price
⇒ Cost price

Correct Answer: Calcutta

Solution : The correct answer is Calcutta.

On November 16, 2021, West Bengal Chief Minister Mamata Banerjee introduced the "Duare Ration" (ration at doorstep) programme.

Correct Answer: Leukaemia

Solution : The correct answer is Leukemia.

Leukemia is known as blood cancer or cancer in blood forming tissues, i.e. bone marrow and lymphatic system. It is one of the most lethal type of cancer which remains largely unknown in its initial stages because of no or