There were two convincing wins for Leinster in their U15 and U17 interprovincials against their Munster counterparts in Cork.
North County's John Devane hit 11 fours and a six in an unbeaten 116 from 120 balls as he and club team mate Luke Whelan shared a fifth wicket stand of 163 in 21 overs after the contest was evenly poised at 63 for 4.
Whelan made 57, while Mark Tonge added late runs with an unbeaten 20 as Leinster posted 260 for 7 - three wickets for Freddie Froggatt and Hassan Khan.
Tonge and Ahmed Shah then claimed three wickets apiece, and Yash Bala two as Munster were dismissed for 134 - Freddie Froggatt top scoring with 39 and Gautam 29.
It was a similar story in the Under 15 match with YMCA's Reuben Wilson making 67 not out as they made 246, sharing stands of 75 for the fifth wicket Matthew Weldon 40, and 62 for the sixth with Olly Riley 37.
Kumar picked up three wickets, while there were two apiece for Hafeez and Uddin.
Munster were soon in trouble with wickets for Olly Riley 3-14, Matthew Weldon 2-19, and Sebastian Dijkstra 2-12, and it took a hard hit 25 from number ten Ahmandzai to get them to three figures.
All the sides are back in action on Wednesday with Leinster in the NCU and Munster meeting the NW in Dublin at Phoenix and Civil Service.
U17 IP40 Series, At The Mardyke
Leinster 260-7 (40 overs; J Devane 116*, L Whelan 57, M Tonge 20*; H Khan 3-35, F Froggatt 3-44)
Munster 134 all out (34.2 overs; F Froggatt 39, Gautam 29; M Tonge 3-18, A Shah 3-27, Yash Bala 2-19)
Munster won by 126 runs
U15 IP40 series At Cork Harlequins
Leinster 246 all out (38.1 overs; Reuben Wilson 67*, Matthew Weldon 40, Olly Riley 37; K Kumar 3-38, Z Hafeez 2-42, S Uddin 2-42)
Munster 105 all out (30 overs; A Ahmadzai 25; Olly Riley 3-14, Matthew Weldon 2-19, Sebastian Dijkstra 2-12).
Leinster won by 141 runs