TCS Company Numerical Ability LCM and HCF

Any one remember * marks question and it's answer?

Read Solution (Total 6)

TCS Other Question

Dec-2-2015, Timing:3:30Pm, 2 marks question.

the numbers from 1 to 20 are written in the below order, sum of any two adjacent numbers is prime number.
20;A;16;15;4;B;12:C;10;7;6;D;2;17;14;9;8;5;18;E

then find value at A ?
small confusion about what they asked value of A or D?
There was a question of train. 2 trains crossing each other in 23 seconds. A man standing on the platform.. Find the ratio of speeds of 2 trains.i cannot completely recall that question