diff --git a/lib/yargs-parser.ts b/lib/yargs-parser.ts
index 47ad99dd..90078178 100644
--- a/lib/yargs-parser.ts
+++ b/lib/yargs-parser.ts
@@ -325,7 +325,8 @@ export class YargsParser {
 
           // current letter is an alphabetic character and next value is a number
           if (/[A-Za-z]/.test(letters[j]) &&
-            /^-?\d+(\.\d*)?(e-?\d+)?$/.test(next)) {
+            /^-?\d+(\.\d*)?(e-?\d+)?$/.test(next) &&
+            checkAllAliases(next, flags.bools) === false) {
             setArg(letters[j], next)
             broken = true
             break
diff --git a/test/yargs-parser.cjs b/test/yargs-parser.cjs
index 24935a26..159e1dc7 100644
--- a/test/yargs-parser.cjs
+++ b/test/yargs-parser.cjs
@@ -1128,6 +1128,26 @@ describe('yargs-parser', function () {
       result.should.have.property('b').that.is.a('boolean').and.is.true // eslint-disable-line
       result.should.have.property('_').and.deep.equal([123])
     })
+
+    // Fixes: https://github.com/yargs/yargs-parser/issues/283
+    it('should set boolean numeric option, with numeric option at the end of a group', function () {
+      const result = parser(['-x1'], { boolean: ['x', '1'] })
+      expect(result).to.have.property('x', true)
+      expect(result).to.have.property('1', true)
+    })
+
+    it('should set boolean numeric option, with numeric option at the start of a group', function () {
+      const result = parser(['-1x'], { boolean: ['x', '1'] })
+      expect(result).to.have.property('x', true)
+      expect(result).to.have.property('1', true)
+    })
+
+    it('should set boolean numeric option, with numeric option as part of a group', function () {
+      const result = parser(['-x1b'], { boolean: ['x', '1', 'b'] })
+      expect(result).to.have.property('x', true)
+      expect(result).to.have.property('1', true)
+      expect(result).to.have.property('b', true)
+    })
   })
 
   describe('defaults', function () {