Question

Four bells commence tolling together at 1: 00 pm and toll at intervals of 2, 4, 6 and 8 minutes respectively. At what time will the bells toll together again?

• A. 1 : 28 pm
• B. 1 : 20 pm
• C. 1 : 16 pm
• D. 1 : 24 pm

Answer 1

The correct option is D 1 : 24 pm

Find the LCM of 2, 4, 6 and 8 to find the time of tolling.

$\begin{array}{cc}2& 2,4,6,8\\ & 1,2,3,4\end{array}$

LCM $=2\times 2\times 3\times 2$ = 24
The bells will toll together at 1 : 24 pm