160 is half of 320.
Twice 160 is 320. It's like asking what's the capital of France - easy peasy lemon squeezy. So, there you have it, 320 is the magic number you're looking for.
320
The number between 240 and 320 is 280. This number falls exactly halfway between the two given numbers on the number line. It can be calculated by finding the average of the two numbers: (240 + 320) / 2 = 280.
320