Ans 1:
Class : Class 8
It is provided a month before the exam from olympiadtrainer..... Sorry for late answer
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Ans 3:
Class : Class 4
The 1st two patterns show a 'stacking relation' with innermost moving to outermost.To me, the answer is one among C or D as the expected pattern is - black square innermost, then a white pentagon and finally a black circle. Both C and D looks the same and unable to figure out diff between these.