Which of the following exist as a term in mathematics?

Tariff numbers
Taxicab numbers
Bicycle numbers
Car numbers
is defined as the smallest number that can be expressed as a sum of two positive cube numbers in n distinct ways. The name is derived from a conversation in about 1919 involving mathematicians G. H. Hardy and Srinivasa Ramanujan. Hardy has ridden in taxi-cab No. 1729, and remarked that the number seemed to be rather a dull one. Ramanujan replied that the number was very interesting, as the smallest number expressible as the sum of two cubes in two different ways.
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Tariff numbers
Taxicab numbers
Bicycle numbers
Car numbers
answers
flagSwitzerland
12%
87%
0%
0%
16
flagIndia
0%
50%
27%
22%
18
flagPoland
36%
43%
9%
10%
1344
flagGermany
14%
42%
14%
28%
21
flagthe United Kingdom
45%
41%
8%
4%
24
flagUnknown
44%
31%
10%
13%
67
flagthe United States
40%
30%
20%
10%
20