7 thoughts on “Writer’s Block – CAT Scan 3

  1. A man covers certain distance by his car, had he moved 6km/hr faster he would have taken 4 hours less, if he had moved 4km/hr slower he would have taken 4 hours more.Find the distance.
    Please help with the approach

    • If there are options, I will use options. Failing that, I suspect trial and error will be quicker than solving equations. Still if you want equations:
      s * t = (s + 6)*(t-4) = (s – 4)(t + 4)
      Trial and error gave me 24 speed and 20 time (in around a minute), giving distance of 24 * 20 = 480.

  2. In the first question the answer comes out to be 12. This is the harmonic mean of 15 and 10. I don’t think this is just a coincidence. Could you please explain.

    • It isn’t a coincidence – it is because the times are in AM in this particular case. But it will not work for any random times…only if times are in AM will speeds be in HM and vice versa…


  3. Pingback: How to solve CAT questions in 60 seconds? | IMS VKpedia

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s