Answer / ramesh m

??,55,66,48,61,74,60,75,90

the difference of 48,61,74 is 13

the difference of 60,75,90 is 15

the difference of??,55,66, 11

so the number is 55-11 =44

Answer / anoop shrivastava

45

Answer / olivia wen

105

55,66--11
48,61,74---13
60,75,90,x----15

so x will be 105

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