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Number of ciphers after decimal before a...

Number of ciphers after decimal before a significant figure comes in `(5/3)^(-100)` is- a.`\ 21` b. `22` c.`\ 23` d. none

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Suppose U denotes the number of digits in the number (60)^(100) and M denotes the number of cyphers after decimal, before a significant figure comes in (8)^(-296) . If the fraction U/M is expressed as rational number in the lowest term as p//q (given log_(10)2=0.301 and log_(10)3=0.477 ) . The value of p is

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