सात डिब्बे B, C, D, I, J, K और L एक के ऊपर एक रखे गए हैं लेकिन जरूरी नहीं कि इसी क्रम में हों। L के ऊपर केवल चार डिब्बे रखे गए हैं। J के ऊपर केवल एक डिब्बा रखा गया है। J और C के बीच केवल एक डिब्बा रखा गया है। B को D के ठीक ऊपर रखा गया है। K को I के नीचे किसी स्थान पर रखा गया है। I और B के बीच कितने डिब्बे रखे गए हैं?

Seven people, C, D, E, F, W, X and Y, are sitting around a circular table facing the centre. Only two people sit between C and D when counted from the left of D. X sits to the immediate right of D. Only three people sit between D and E. F sits to the immediate right of W. How many people sit between Y and F when counted from the right of F?

Five students (A, B, C, D, and E) are standing in a line during a school assembly. C is standing exactly behind D. E is not standing behind B. A is standing ahead of C but not ahead of B. If 'behind' means being exactly next to someone's back and 'ahead' means anywhere in front of someone, who among the five students is standing at the third position from the front?