Logic Riddles for Kids

Which months have at least 28 days?

We use the calendar most of the world uses, where every month has 28 to 31 days. "At least 28" means 28 or more.

All twelve months.

Two fathers and two sons share three sandwiches, one sandwich each. How can there be only three people?

One person can be a father and a son at the same time, and the three people are from one family.

They are a grandfather, his son, and his grandson.

In a race, you pass the runner who is in second place. What place are you in now?

You pass only that one runner, and nobody passes you at the same time.

Second place.

Five apples are on the table. You take two. How many apples did you take?

The question asks how many apples you took, not how many are left on the table.

Two.

A ball is in one of three boxes: red, blue, or green. It is not in red or green. Where is it?

There is exactly one ball, and it is certainly in one of the three boxes.

The blue box.

In a pretend game, every red block is a cube, and no cube can roll. Can any red block roll in that game?

Inside the pretend game, both rules are always true, even if real blocks could tumble. We use only the rules, not real life.

No.

Ali is ahead of Bo in a three-person line. Bo is ahead of Cam. Who is in the middle?

The three people stand in one straight line, and "ahead" means closer to the front.

Bo.

Two US coins total 30 cents. One of them is not a nickel. Which coins are they?

Only real US coins count. "One of them is not a nickel" is true of the quarter; it does not mean the other coin cannot be a nickel.

A quarter and a nickel. The quarter is the one that is not a nickel.

A farmer must take a fox, a chicken, and grain across a river. The boat carries the farmer and one item. Without the farmer, the fox cannot stay with the chicken, or the chicken with the grain. How can everything cross?

Only the farmer can row the boat, and it holds the farmer plus at most one item. Trouble happens only on a bank the farmer has left, never during a crossing.

Take the chicken across. Go back alone. Take the fox across. Bring the chicken back. Take the grain across. Go back alone. Take the chicken across.

Anna, Beth, and Cara each have a different pet: cat, dog, or fish. Anna has neither cat nor dog. Beth does not have the dog. Who has each pet?

Each girl has exactly one pet, and no two girls have the same kind of pet.

Anna has the fish, Beth has the cat, and Cara has the dog.

Eight balls look identical, but one is heavier. Using a balance scale, how can you always find it in no more than two weighings?

Exactly one ball is heavier, and the other seven weigh the same. The balance scale only shows which side is heavier, or that the two sides are equal.

Weigh three against three. If they balance, weigh the last two against each other. If one side is heavier, take two balls from that side and weigh one against the other; if they balance, the third ball from that side is the heavy one.

A drawer has three red socks and three blue socks. Without looking, how many socks must you take out to be sure of getting two of the same color?

You take socks out one at a time without looking, and any two socks of the same color count as a pair.

Three.