NTSE Stage 2 MAT 2016 Question Paper

Question : 46 of 100

Marks: +1, -0

What comes next in the following sequence of codes ? 1218199, 1006480, 814963, 643648, ________

Solution:

121/81/99,100/64/80, 81/49/63, 64/36/48, 49/25/35
I.TERMS
121 100 81 64 49

\;11^{2},\;\;\;\;10^{2},\;\;\;\;\;9^{2} ,\;\; 8^{2} , \;\;\;\;7^{2}

II.TERMS
81 64 49 36 25

9^{2},\;\;\;\;8^{2},\;\;\;\;7^{2} ,\;\; 6^{2} , \;\;\5^{2}

III.TERMS

99 80 63 48 35

(10-1)^2,\;(9^2-1),\;\;(8^2-1),\;\;(7^2-1),\;(6^2-1)

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