The prize for correctly answering the first seven questions in the Indian game show Kaun Banega Crorepati is equal to 40,000 Indian rupees.
It is also used as an approximation for the circumference of the Earth, which is slightly larger than 40,000 km.
In the Hawaiian language, 40,000 is called “kini”.
Approximations[]
| Notation | Lower bound | Upper bound |
|---|---|---|
| Scientific notation | \(4\times10^4\) | |
| Arrow notation | \(200\uparrow2\) | |
| Steinhaus-Moser Notation | 5[3] | 6[3] |
| Copy notation | 3[5] | 4[5] |
| Chained arrow notation | \(200\rightarrow2\) | |
| Taro's multivariable Ackermann function | A(3,12) | A(3,13) |
| Pound-Star Notation | #*(141)*2 | #*(142)*2 |
| PlantStar's Debut Notation | [2] | [3] |
| BEAF | {200,2} | |
| Bashicu matrix system | (0)[200] | |
| Bird's array notation | {200,2} | |
| Hyperfactorial array notation | 7! | 8! |
| Strong array notation | s(200,2) | |
| Fast-growing hierarchy | \(f_2(11)\) | \(f_2(12)\) |
| Hardy hierarchy | \(H_{\omega^2}(11)\) | \(H_{\omega^2}(12)\) |
| Slow-growing hierarchy | \(g_{\omega^2}(200)\) | |