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If a baseball and a bat cost $1.10 together, and the bat costs $1.00 more than the ball, how much does the ball cost?

Solution

5 cents. System 1 thinking often leads to mistakes in this type of problem.

Next question

A father and son are in a horrible car crash that kills the dad. The son is rushed to the hospital; just as he’s about to go under the knife, the surgeon says, “I can’t operate—that boy is my son!” How is that possible?

Solution

The surgeon is the boy’s mother. This puzzle illustrates the persistence of gender discrimination.

Next question

In a lake, there is a patch of lily pads. Every day, the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake?

Solution

47 days. To answer correctly, you need to ignore your system 1 and use your system 2.

Next question

Alan is smart, hard-working, impulsive, stubborn and jealous.
Ben is jealous, stubborn, impulsive, hard-working and smart.
Who should you hire?

Solution

They are the same, but a priming effect often make people prefer the first candidate.

Next question

BVA group members

We are proud to be part of the BVA Group

one of the world’s largest social and market research and consulting groups, whose other members include:

– BVA BDRC (UK)
– BVA DOXA (Italy)
– BVA France
– PRS IN VIVO (Global shopper insights)

We work regularly in partnership with our BVA Group sister agencies, who bring global insights capabilities, local market knowledge and in-depth sector expertise (in Financial Services, Pharma, Transport and Consumer Goods, among other sectors).

We are BVA’s dedicated expert behavioral unit

BVA is one of the world’s biggest social and market research and consulting groups, with subsidiaries representing more than a thousand accomplished and experienced consultants and practitioners, distributed across all continents with vast business and industry sector expertise (www.bva-group.com). BVA Nudge Consulting draws on this unique ecosystem of collaborators to reinforce its expertise with the group’s relevant competencies, whether in specific industry domain expertise (public policy, health, banking, insurance, telecom, mass consumption, etc.) or a specific methodological expertise (data science, concept creation, video production, internal communication, design thinking, etc.). Unlike other independent BE consultancies, BVA’s ecosystem allows the Nudge Unit to leverage its nearly unlimited capacity to configure customized relevant teams, adapted to each client’s project depending on its unique needs.