√5× √5×√2×√2
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Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.
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Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.
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