Exhibit to Sub-Item 77Q3 of Form N-SAR


(i)           Based on their evaluation of registrant's disclosure controls and
              procedures (as defined in rule 30a-2(c) under the Investment
              Company Act of 1940 (17 CFR 270.30a-2(c)) as of February 21, 2002,
              registrant's principal executive officer and principal financial
              officer found registrant's disclosure controls and procedures to
              be appropriately designed to ensure that information required to
              be disclosed by registrant in the reports that it files under the
              Securities Exchange Act of 1934 (a) is accumulated and
              communicated to registrant's management, including its principal
              executive officer and principal financial officer, to allow timely
              decisions regarding required disclosure, and (b) is recorded,
              processed, summarized and reported, within the time periods
              specified in the rules and forms adopted by the U.S. Securities
              and Exchange Commission.

(ii)          There have been no significant changes in registrant's internal
              controls or in other factors that could significantly affect
              registrant's internal controls subsequent to the date of the most
              recent evaluation as indicated, including no significant
              deficiencies or material weaknesses that required corrective
              action.

(iii)         See certification below.

     CERTIFICATIONS

     I, John V. Murphy, certify that:

     1. I have reviewed this report on Form N-SAR of Centennial Money Market
     Trust;

     2. Based on my knowledge, this report does not contain any untrue statement
     of a material fact or omit to state a material fact necessary to make the
     statements made, in light of the circumstances under which such statements
     were made, not misleading with respect to the period covered by this
     report;

     3. Based on my knowledge, the financial information included in this
     report, and the financial statements on which the financial information is
     based, fairly present in all material respects the financial condition,
     results of operations, changes in net assets, and cash flows (if the
     financial statements are required to include a statement of cash flows) of
     the registrant as of, and for, the periods presented in this report;

     4. The registrant's other certifying officers and I are responsible for
     establishing and maintaining disclosure controls and procedures (as defined
     in rule 30a-2(c) under the Investment Company Act) for the registrant and
     have:

     a) designed such disclosure controls and procedures to ensure that material
     information relating to the registrant, including its consolidated
     subsidiaries, is made known to us by others within those entities,
     particularly during the period in which this report is being prepared;

     b) evaluated the effectiveness of the registrant's disclosure controls and
     procedures as of a date within 90 days prior to the filing date of this
     report (the "Evaluation Date"); and

     c) presented in this report our conclusions about the effectiveness of the
     disclosure controls and procedures based on our evaluation as of the
     Evaluation Date;

     5. The registrant's other certifying officers and I have disclosed, based
     on our most recent evaluation, to the registrant's auditors and the audit
     committee of the registrant's board of directors (or persons performing the
     equivalent functions):

     a) all significant deficiencies in the design or operation of internal
     controls which could adversely affect the registrant's ability to record,
     process, summarize, and report financial data and have identified for the
     registrant's auditors any material weaknesses in internal controls; and

     b) any fraud, whether or not material, that involves management or other
     employees who have a significant role in the registrant's internal
     controls; and

     6. The registrant's other certifying officers and I have indicated in this
     report whether or not there were significant changes in internal controls
     or in other factors that could significantly affect internal controls
     subsequent to the date of our most recent evaluation, including any
     corrective actions with regard to significant deficiencies and material
     weaknesses.

     Date: 2/21/03
           --------
                                 /s/John V. Murphy
                              -----------------------
                                 John V. Murphy
                                    President

     I, Brian W. Wixted, certify that:

     1. I have reviewed this report on Form N-SAR of Centennial Money Market
     Trust;

     2. Based on my knowledge, this report does not contain any untrue statement
     of a material fact or omit to state a material fact necessary to make the
     statements made, in light of the circumstances under which such statements
     were made, not misleading with respect to the period covered by this
     report;

     3. Based on my knowledge, the financial information included in this
     report, and the financial statements on which the financial information is
     based, fairly present in all material respects the financial condition,
     results of operations, changes in net assets, and cash flows (if the
     financial statements are required to include a statement of cash flows) of
     the registrant as of, and for, the periods presented in this report;

     4. The registrant's other certifying officers and I are responsible for
     establishing and maintaining disclosure controls and procedures (as defined
     in rule 30a-2(c) under the Investment Company Act) for the registrant and
     have:

     a) designed such disclosure controls and procedures to ensure that material
     information relating to the registrant, including its consolidated
     subsidiaries, is made known to us by others within those entities,
     particularly during the period in which this report is being prepared;

     b) evaluated the effectiveness of the registrant's disclosure controls and
     procedures as of a date within 90 days prior to the filing date of this
     report (the "Evaluation Date"); and

     c) presented in this report our conclusions about the effectiveness of the
     disclosure controls and procedures based on our evaluation as of the
     Evaluation Date;

     5. The registrant's other certifying officers and I have disclosed, based
     on our most recent evaluation, to the registrant's auditors and the audit
     committee of the registrant's board of directors (or persons performing the
     equivalent functions):

     a) all significant deficiencies in the design or operation of internal
     controls which could adversely affect the registrant's ability to record,
     process, summarize, and report financial data and have identified for the
     registrant's auditors any material weaknesses in internal controls; and

     b) any fraud, whether or not material, that involves management or other
     employees who have a significant role in the registrant's internal
     controls; and

     6. The registrant's other certifying officers and I have indicated in this
     report whether or not there were significant changes in internal controls
     or in other factors that could significantly affect internal controls
     subsequent to the date of our most recent evaluation, including any
     corrective actions with regard to significant deficiencies and material
     weaknesses.

     Date: 2/21/03
           --------
                                /s/Brian W. Wixted
                                 ---------------------
                                 Brian W. Wixted
                                    Treasurer