Two simple pendulums of lengths 1.44 m and 1 m start swinging together. After how many vibrations will they again start swinging together

Two pendulums of lengths 1.69m and 1.44m start swinging togther. After how many vibrations will they again start swinging togther?

Two pendulums of lengths 1.44 m and 1 m start oscillating together. After how many oscillations will Activate they again start swinging together?

Two simple pendulums of length 100m and 121m start swinging together. They will swing together again after

The pendulums of lengths 100 cm and 110.25 cm start oscillating in phase. After how many oscillation will they again be in same phase ?

Two simple pendulums of length 100 m and 121 m start swinging together in the same directionvith same phase.They will swing together again in same phase after.