Quickly adding - quick buzzing Practising number decimations and overcoming counting - that's ALARM!, the cheeky fun game with number cards and buzzers. All players turn over a card at the same time. If two or more numbers add up to 10 (or 12), you have to buzz quickly and win valuable cards. ALARM! offers three game options with increasing difficulty:1) "Target number 10" for training the division of tens.2) "Target number 12" for the decimal transition.3) "Double", the professional variant for lightning speed.Contents: 55 playing cards with the numbers from 1 to 9 . 1 non-battery-operated buzzer with short horn sound . Instructions.Suitable for: 1st-4th grade, regular and remedial classes, after-school care, family.