00624nam a2200217Ia 4500008004100000020001800041050000800059050001400067100001700081245002600098245007700124245008700201260002200288260001400310260000900324300001500333300002000348300001000368650001700378700001100395181129s9999    xx            000 0 und d  a9781782404613  a510  bR674 2017  aRooney, Anne 0aMaths in 30 seconds : 0b30 fascinating topics for maths masterminds explained in half a minute / 0cby Anne Rooney ; illustrated by Putri Febriana ; cunsultant by Dr. Katie Steckles.  aLondon, England :  bIvy Kids,  c2017  a96 pages :  billustrations ;  c23cm.  aMathematics.  aTitle.