Raffles Education was also asked to confirm its compliance with the listing rules.
SEE:No Signboard prompts SGX query on 90.3% surge in share price
Shares in Raffles Education further rose, reaching an intra-day high of 21.3 cents, 29.9% above its last closed price.
Shares in the company closed 3.6 cents higher or 22.0% up at 20 cents on April 30.