Five distinct 2-digit numbes are in a ge...

Five distinct 2-digit numbes are in a geometric progression. Find the middle term.

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RESONANCE-SEQUENCE & SERIES -EXERCISE -2 (PART -I PREVIOUS ASKED QUESTION FOR PRE RMO)

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Let E(n) denote the sum of the even digits of n. For example, E (1243)...
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Consider the sequence 1,3,3,5,5,5,5,5,7,7,7,7,7,7,7,…… and evaluate it...
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Find the value of the expression ((3 ^(4) + 3 ^(2) +1) .(5 ^(4) + 5 ...
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Let S=1 + (1)/(sqrt2) + (1)/(sqrt3) + (1)/(sqrt99) + (1)/(sqrt100). Fi...
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For positive real numbers x and y, define their special mean to be ave...
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Suppose x is a positive real number such that {x}, [x] and x are in th...
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Five distinct 2-digit numbes are in a geometric progression. Find the ...
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What is the value of sum (1+j = odd 1 le | lt | le 10) (i +j) - sum(1 ...
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A book is published in three volumes, the pages being numbered from 1 ...
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