Four bells ring at intervals of 6, 7, 8 and 9 respectively. After how many seconds do all the bells ring together?

504

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516

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508

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512

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Solution

The correct option is A
504

The time after which the bells ring together is the L.C.M of the number's 6, 7, 8, 9.

$∴$ L.C.M = 2 $\times$ 3 $\times$ 7 $\times$ 4 $\times$ 3 = 504

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Four bells ring at intervals of 6, 7, 8 and 9 respectively. After how many seconds do all the bells ring together?

The correct option is A 504 The time after which the bells ring together is the L.C.M of the number's 6, 7, 8, 9. ∴ L.C.M = 2 × 3 × 7 × 4 × 3 = 504

The correct option is A
504

The time after which the bells ring together is the L.C.M of the number's 6, 7, 8, 9.

$∴$ L.C.M = 2 $\times$ 3 $\times$ 7 $\times$ 4 $\times$ 3 = 504