Please check https://www.ica.gov.sg/page.aspx?pageid=95 for entry requirements to Singapore
The Singapore dollar is used here and notes come in denominations of S$2, S$5, S$10, S$50, S$100, S$1,000 and S$10,000. Coins come in 5, 10, 20 and 50 cents and S$1.
➣ Entry into Singapore is facilitated by the Singapore Immigration and Checkpoints Authority (ICA). ICA Contact Details