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Beginner Content Feedback

I am working on some beginner content for effect. Like very low level "what would it look like to write functions in with effect-ts" and do more 'functional programming' style with Effect-TS

This is a current example I have and just want feedback from those who understand effect-ts more than I as to:

1. where I am going wrong
2. more idiomatic way of writing effect
3. how you would make this better.

I have test for the output but just wanting to get the feedback here.

export const ex4 = `use compose to run the following three commands

1. map over the numbers and square each number
2. use filter keep numbers divisible by 8
3. use reduce to count the resulting numbers
`;
export const exercise4 = () => {
  const numbers = [1, 2, 4, 8, 16, 32];
  return pipe(
    numbers,
    Effect.succeed,
    Effect.map(
      (arr) =>
        arr
          .map((x) => x * x) // 1. square each number
          .filter((x) => x % 8 === 0) // 2. keep numbers divisible by 8
          .reduce((acc, cur) => acc + 1, 0) // 3. count the numbers (not sum them)
    ),
    Effect.runSync
  );
};

export const ex4 = `use compose to run the following three commands

1. map over the numbers and square each number
2. use filter keep numbers divisible by 8
3. use reduce to count the resulting numbers
`;
export const exercise4 = () => {
  const numbers = [1, 2, 4, 8, 16, 32];
  return pipe(
    numbers,
    Effect.succeed,
    Effect.map(
      (arr) =>
        arr
          .map((x) => x * x) // 1. square each number
          .filter((x) => x % 8 === 0) // 2. keep numbers divisible by 8
          .reduce((acc, cur) => acc + 1, 0) // 3. count the numbers (not sum them)
    ),
    Effect.runSync
  );
};

export const ex4 = `use compose to run the following three commands

1. map over the numbers and square each number
2. use filter keep numbers divisible by 8
3. use reduce to count the resulting numbers
`;
export const exercise4 = () => {
  const numbers = [1, 2, 4, 8, 16, 32];
  return pipe(
    numbers,
    Effect.succeed,
    Effect.map(
      (arr) =>
        arr
          .map((x) => x * x) // 1. square each number
          .filter((x) => x % 8 === 0) // 2. keep numbers divisible by 8
          .reduce((acc, cur) => acc + 1, 0) // 3. count the numbers (not sum them)
    ),
    Effect.runSync
  );
};

export const ex4 = `use compose to run the following three commands

1. map over the numbers and square each number
2. use filter keep numbers divisible by 8
3. use reduce to count the resulting numbers
`;
export const exercise4 = () => {
  const numbers = [1, 2, 4, 8, 16, 32];
  return pipe(
    numbers,
    Effect.succeed,
    Effect.map(
      (arr) =>
        arr
          .map((x) => x * x) // 1. square each number
          .filter((x) => x % 8 === 0) // 2. keep numbers divisible by 8
          .reduce((acc, cur) => acc + 1, 0) // 3. count the numbers (not sum them)
    ),
    Effect.runSync
  );
};

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