Explanation

The idiom once in a blue moon means on rare occasions or rarely.

The idiom means something that happens very rarely or seldom.

It emphasizes infrequent or unusual events.

Explanation

On 11 February 2021, Pakistan conducted a successful launch of the Babur-1A cruise missile with a range of 450 kilometers.

while 

Pakistan successfully conducted a flight test of air-launched cruise missile Ra’ad-II on 18th February 2020.

Explanation

Elections were held in eleven provinces - Madras, Central Provinces, Bihar, Orissa, United Provinces, Bombay Presidency, Assam, NWFP, Bengal, Punjab and Sindh.

Indian National Congress won 8 provinces.

Explanation

China has ended its One Child Policy and allowed parents to have another child.

It was introduced in China in 1979.

It was abolished in 2015.

Explanation

Formula: aₙ = a + (n - 1)d

a₇ = 28 + (7 - 1)(-4) = 28 + (6 × -4) = 28 - 24 = 4

Explanation

If a constant is added to each value, the mean increases by that constant.

New mean = 6 + 3 = 9.

Explanation

Total students = 30 boys + 20 girls = 50

Percentage of boys = (30 / 50) × 100 = 60%

Explanation

Word Government Summit 2023

Venue: Dubai, UAE

Date: 13 February 2023

Theme 2023: Shaping Future Governments 

Explanation

50% of 100 is 50.

50% of 50 is 25.

Explanation