Buttonwood interview questions

I met with the President/founder and the account director. Fairly simple stuff. They talked about the firm and how it got started, told me what I'd be doing, asked me questions about my background. The two men were very calm and not too intense. They were in good spirits and didn't appear too intimidating.

an onsite after an 30 minute interview. simple math questions, brain teasers, backgrounds, etc 1. flip 100 coins, what is the probability that there is less that 40 heads? 2. 100 gold bar/ iron bar question 3. question on link-list 4.