Correct Answer: CR

Solution : Given:
OD, LA, IX, FU,?

Subtract 3 from the place value of the first and second letter, to get the required missing term in the series –
OD→O – 3 = L; D – 3 = A→LA
LA→L – 3 = I; A – 3 = X→IX
IX→I – 3 = F; X – 3 = U→FU
FU→F – 3 = C; U – 3 = R→CR

So, the required missing term in the series is CR. Hence, the third option is correct. 

Correct Answer: Centenarian

Solution : The first option is correct.

Centenarian means a person who is 100 years old or older. It is a noun and can be used to describe someone who has reached the age of 100 or more.

Therefore, the correct answer is centenarian.

Correct Answer: 48

Solution : Given: 25 × 7 ÷ 175 – 196 ÷ 14 × 2 + 625 ÷ 25 × 3
= $25 × \frac{7}{ 175} - \frac{196}{14} × 2 + \frac{625}{ 25} ×3$
= 1 – 14 × 2 + 25 × 3
= 1 – 28 + 75
= 48
Hence, the correct answer is 48.

Correct Answer: 1888

Solution : The correct option is 1888.

Durand Cup was first founded in India in 1888, more precisely in the city of Shimla. The competition bears Sir Mortimer Durand's name, who founded it and served as the British Indian government's Foreign Secretary at the time. With a long history, the Durand Cup has been closely linked to the Indian football community. Numerous football teams and clubs have participated in the competition over the years, which has helped to develop and promote football in India.

Correct Answer: birth rate

Solution : The correct answer is the birth rate.

Birth rate is the number of live births per thousand people in a year. The number of deaths per thousand persons in a year is known as the death rate. An increase in the birth rate will increase the population density of a region or a country. If the birth and death rate remains equal, then the population density will remain in control.

Correct Answer: 12%

Solution : Let the original price be Rs. 100.
The cost price after 20% discount will be Rs. 80.
The selling price = 140% of Rs. 80 = $\frac{140}{100}\times80$ = Rs. 112
Percentage change = $\frac{112-100}{100}\times100$ = 12%
Hence, the correct answer is 12%.

Correct Answer: 6.14

Solution : Runs given = 66 + 56 + 72 + 45 + 20 + 36 = 295
Over bowled = 9 + 10 + 8 + 6 + 8 + 7 = 48
Economy rate $=\frac{\text { Runs given }}{\text { Overs bowled }}$
$=\frac{295}{48}$
$=6.14$
Hence, the correct answer is 6.14.

Correct Answer: Palk Strait

Solution : The correct option is The Palk Strait.

Sri Lanka is separated from the mainland of India by the Palk Strait and the Gulf of Mannar. It is a country located in the southeast of India. The Palk Strait separates India and Sri Lanka and was named after Robert Palk, who was the governor of Madras (1755–1763). The Palk Strait is a strait between Tamil Nadu and the Jaffna District of the Northern Province of Sri Lanka.

Correct Answer: cube of the semi-major axis

Solution : The correct option is a cube of the semi-major axis.

According to Kepler's Law of Periods, a planet's orbital period square is precisely proportionate to its semi-major axis cube. One of Johannes Kepler's three laws of planetary motion was determined in the early 17th century. The semi-major axis of the planet's orbit, denoted by the symbol 'a', is the semi-major axis of the Law of Periods, which is mathematically defined as T²∝ a³. This rule may be used to determine how long an orbit around the sun will last for every planet in the solar system, including Earth.

Correct Answer: 5

Solution : The minimum number of students in the school = Number of boys + Number of the girls.
The minimum number of students in the school 1 = 44 + 56 = 100
The minimum number of students in the school 2 = 34 + 45 = 79
The minimum number of students in the school 3 = 47 + 34 = 81
The minimum number of students in the school 4 = 95 + 54 = 149
The minimum number of students in the school 5 = 45 + 32 = 77
Hence, the correct answer is the school 5.