Daily 30 Seconds

A BrainBashers mental arithmetic drill: a starting number appears, followed by a sequence of operations such as halving, doubling, squaring, taking a fraction or a percentage, or finding a square root. The running total must be tracked in the head and the final value given, ideally within 30 seconds. Easy, medium and hard versions and past dates are offered.

How you play

Find the equation

Languages

Any (no reading needed)

Daily puzzle

Yes

Archive

Yes

Made by

BrainBashers

• 7.9
  Nerdle

  Find the hidden equation in six tries
  Play
• 7.4
  Mathler

  Find the hidden calculation for a given result
  Play
• 7.2
  Summle

  Combine number tiles to reach a target
  Play
• 6.8
  Knotilus

  Split ten numbers into three linked sequences
  Play
• 6.6
  Cagey

  Fill number cages to hit arithmetic targets
  Play
• 6.6
  Dodeku

  Place number tiles to match the target sums
  Play
• 6.5
  Numble

  Reach a target number using a given set
  Play
• 6.5
  Numgrove

  Fill a number tree so each branch adds up
  Play