Q 01/05

How many countries make up Southeast Asia and ASEAN?

A) Nine

B) Ten

C) Eleven

D) Twelve

Answer · why

C) Eleven

Timor-Leste was the last to join ASEAN, in 2025; Papua New Guinea is an observer.

Q 02/05

Which is the only landlocked country in Southeast Asia?

A) Laos

B) Cambodia

C) Myanmar

D) Brunei

Answer · why

A) Laos

It has three UNESCO World Heritage Sites, including Luang Prabang and the Plain of Jars.

Q 03/05

Which is the longest river in Southeast Asia?

A) Irrawaddy

B) Chao Phraya

C) Mekong

D) Red River

Answer · why

C) Mekong

It rises on the Tibetan Plateau and runs 4,900 km through Myanmar, Laos, Thailand, Cambodia and Vietnam.

Q 04/05

What is the highest mountain in Southeast Asia?

A) Puncak Jaya

B) Mount Kinabalu

C) Hkakabo Razi

D) Fansipan

Answer · why

C) Hkakabo Razi

It rises 5,967 metres in the far north of Myanmar.

Q 05/05

As of the early 2020s, which peak was the only place in Southeast Asia with glaciers?

A) Mount Kinabalu

B) Hkakabo Razi

C) Puncak Jaya

D) Mount Apo

Answer · why

C) Puncak Jaya

It rises 5,030 metres on the island of New Guinea, in Indonesian Papua; its small ice fields have been shrinking rapidly.