1.

How many numbers less than 320 are multiples of both 5 and 3?1). 292). 213). 204). 28

Answer»

Multiples of both 5 and 3 means multiples of 15

∴ Multiples of 15 that are LESS than 320 are,

⇒ 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240, 255, 270, 285, 300, 315

∴ There are 21 numbers less than 320 which are multiples of both 5 and 3


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