6 16 57 244 1245 7506 4 (a) (b) (c) (d) (e) What will come in place of (d)?
A
985
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B
980
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C
1004
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D
1015
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E
None of these
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Solution
The correct option is E None of these As 6×2+22=12+4=16 16×3+32=48+9=57 57×4+(4)2=228+16=244 244×5+(5)2=1220+25=1245 Similarly, (a) ⇒4×2+22=8+4=12 (b) ⇒12×3+32=36+9=45 (c) ⇒45×4+42=180+16=196 (d) ⇒196×5+52=980+25=1005