Page 96 - Numbertheory

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36 = 22 × 32 ()
48 = 24 × 3
60 = 22 × 3× 5
gcd(36, 48, 60) = 22 × 3 = 6

. lcm (36, 48, 60) = 24 ×32 × 5 = 720

13068

13068 = 22 × 33 ×112

. 2 + 3+11 =16 11 3 2

25 [British JMC 1999] ( )

2, 3, 5, 7, 11, 13,17,19, 23 25

. 2 + 3 + 5 + 7 +11+13 +17 +19 + 23 = 100

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