Which of the following most accurately explains the cause for the abnormal numbers of chromosomes during human reproduction that can result in Down syndrome, Turner’s syndrome, or Klinefelter’s syndrome?

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#Question id: 7517

#General Aptitude

Two cyclists start from the same place in opposite directions. One goes towards North at 12 km/h and the other goes towards South at 15 km/h. What time will they take to be 8.1 km apart?

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#Question id: 7518

#General Aptitude

In a flight of 800 km, an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 200 km/h and the time of flight increased by 20 min. The duration of the flight is

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#Question id: 7519

#General Aptitude

Two trains start from A and B respectively and travel towards each other at the speeds of 60 km/h and 45 km/h respectively. By the time they meet, the first train has travelled 30 km more than the second. The distance between A and B is

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#Question id: 7520

#General Aptitude

A train X leaves P at 6 am and reaches Q at 10 am. Another train Y leaves Q at 8 am reaches P at 11.30 am. At what time do the two trains cross each other?

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#Question id: 7521

#General Aptitude

A man takes 4 h 20 min in walking to a certain place and riding back. He would have gained 1 h 30 min by riding both ways. The time he would take to walk both ways is

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#Question id: 7522

#General Aptitude

A worker may claim Rs 15 each km which he travels by taxi and Rs 5 for each km which he drives his own car. If in one week he claimed Rs 500 for travelling 80 km, how many km did he travel by taxi?