Correct Answer: Ozone

Solution : The correct answer is Ozone.

The French physicists Charles Fabry and Henri Buisson discovered the ozone layer in 1913. 97 to 99 per cent of the medium-frequency UV radiation emitted by the sun is absorbed by the ozone layer.

Correct Answer:

Solution : As there is no restriction on the rotation of the figures, we will check all possible angles where all the question figures fit in the option figures.
The question figures are embedded in the first option and are represented by different colours in the figure below.

Correct Answer: Both I and II

Solution : Given:
I. 7 × 4 ÷ 2 – 9 + 3 = 22
II. 9 + 4 – 6 × 3 ÷ 2 = –10

After Interchanging 9 and 3.
I. 7 × 4 ÷ 2 – 3 + 9 = 22

Correct Answer: all of the above

Solution : The correct option is all of the above.

Economic development depends on various factors, including Capital formation, natural resources, size of the market, human capital, technological progress etc.

Correct Answer: 6.2% p.a.

Solution : Given: Principal = Rs. 21850
Simple interest = Amount – Principal = Rs. 28623.50 – 21850 = 6773.5
Time = 5 years
Rate = to find
Simple interest = $\frac{\text{Principal × Rate × Time}}{100}$
⇒ $6773.5=\frac{21850 × \text{Rate} × 5}{100}$
⇒ Rate = $\frac{6773.5\times100}{21850

Correct Answer: 2

Solution : $17 ÷ 34 + 2 × 12 ÷ 6 - 5 × 3 ÷ 6$
$=\frac{1}{2} + 2 × 2 - 5 × \frac{1}{2}$
$=\frac{1}{2} + 4 - \frac{5}{2}$
$=\frac{9}{2} - \frac{5}{2}$
$=\frac{4}{2}$
$= 2$
Hence, the correct answer is 2.

Correct Answer: 4365

Solution : Divisibility rule of 15: The number should be divisible by both 3 and 5.
Divisibility rule of 3: The sum of the digits in a number is a multiple of 3.
Divisibility rule of 5: The unit place digit must be 5 or 0.
Checking

Correct Answer: 9 km/hr

Solution : A car has to cover a distance of 288 km in 20 hours.
It covers half of the journey in $\frac{1}{5}$th of the time.
So it covers $\frac{288}{2}=144$ km in $20×\frac{1}{5}=4$ hours
Required speed $=\frac{144}{20-4}=\frac{144}{16}=9$ km/hr
Hence, the correct answer is 9 km/hr.

Correct Answer:

Solution : Given:

Here, rotate the first figure by 45° to get the second missing figure.
So, by following the above pattern the missing figure is –

Therefore, the figure given in option two is the required missing figure. Hence, the second option is correct.

Correct Answer: VH

Solution : Given:
PV, RZ, TD, ?, XL

Add 2 and 4 alternately to the place value of each pair to obtain the next pair.
PV→P + 2; V + 4 = RZ
RZ→R + 2; Z + 4 = TD
TD→T + 2; D + 4