New Living Translation
twenty years old or older who are able to go to war. You and Aaron must register the troops,

American Standard Version
from twenty years old and upward, all that are able to go forth to war in Israel, thou and Aaron shall number them by their hosts.

Berean Study Bible
You and Aaron are to number those who are twenty years of age or older by their divisions—everyone who can serve in Israel’s army.

Douay-Rheims Bible
From twenty years old and upwards, of all the men of Israel fit for war, and you shall number them by their troops, thou and Aaron.

English Revised Version
from twenty years old and upward, all that are able to go forth to war in Israel, thou and Aaron shall number them by their hosts.

King James Bible
From twenty years old and upward, all that are able to go forth to war in Israel: thou and Aaron shall number them by their armies.

World English Bible
from twenty years old and upward, all who are able to go out to war in Israel. You and Aaron shall number them by their divisions.

Young's Literal Translation
from a son of twenty years and upward, every one going out to the host in Israel, ye do number them by their hosts, thou and Aaron;

Numbers 1:3 Additional Translations ...