Type the number

Exercise and reference answers

Questions

1. Answer

   90

   Question

   Share of world people on 10 per cent of land, per cent

2. Answer

   6

   Question

   Asian countries among the ten most populous

3. Answer

   550

   Question

   World population around 1750 in millions

4. Answer

   12

   Question

   Years to go from 5 to 6 billion

5. Answer

   318

   Question

   Years some rich countries need to double

6. Answer

   1798

   Question

   Year of Malthus's theory

Instructions

Type the number only.

Explanation