Does DDR3DDR2 RAM Work on DDR4 Motherboard?

Does DDR4 mean 4 RAM slots? ddr4 slot
➡️【Mk.com】✅is a brand new online gambling platform✅, providing players with rich casino games and attractive promotions. ✅  Is DDR4 RAM compatible in a DDR3 RAM slot? The Question: I'm looking to get a RAM ddr4 slot vs ddr5 Socket LGA1700 for Intel 14th 13th & 12th Gen Processors • Intel B760 • DDR4 4 x DIMM • 2 x DP • 2 x HDMI • 2 x slots • 4 x SATA 6Gbs

ddr4 and ddr5 same slot Socket LGA1700 for Intel 14th 13th & 12th Gen Processors • Intel B760 • DDR4 4 x DIMM • 2 x DP • 2 x HDMI • 2 x slots • 4 x SATA 6Gbs